We are providing you chemistry guess paper 2021 with important MCQs of chemistry 2nd year 2021, important short questions of chemistry 2nd year chapter wise 2021 and important long questions of chemistry 2nd year chapter wise 2021 as a alp model papers 2021.
Objective Type
1) When hydrogen losses its electron to form H+ ion ,
then it resembles .
a) Semi metals b) Halogens c) Alkali metals ✔ d) Noble gases
2) Hydrogen combine with other element through _____
bond .
a) Ionicb) Covalent ✔ c) Co-ordinate covalent d) None of these
3) Hydrogen can form bond with _____ element at a time
.
a) 1 ✔ b) 2 c) 3 d) 4
4) Hydrogen is placed at the top of elements in group
_____ .
a) HA b) HB c) IA ✔d) IB
5) Hydrogen is a ________ like most of halogens .
a) Solidb) Liquid c) Gas ✔ d) None of these
6) Which one is not a periodic property ?
a) Ionization energy b) Density ✔ c) Atomic radii d)
Hydration energy
7) Which of the following elements has lowest -
ionization energy ?
a) Beryllium b) Boron ✔ c) Carbon d) Oxygen
8) Which elements has lowest melting point ?
a) Beryllium b) Magnesium ✔ c) Calcium d) Barium
9) Which element form an ion with charge + 3 ?
a) Chromium ✔ b) Copper c) Lead d) Zinc
10) The strength of binding energy of transition
elements depends upon ?
a) Number of electron pairs b) Number of neutrons c)
Number of unpaired electrons ✔ d) Number of protons
11) Alkali metals are
a) Acidic in nature b) Strong oxidizing agent c)
Amphoteric in natured) Strong reducing agents✔
12) Element ( cs ) cesium show resemblance with .
a) Ca b) Cr c) Both A & B d) Fr ✔
13) Which of the following has the highest first
ionization energy ?
a) B b) C c) O ✔ d) N
14) As we go from left to right in 4th period , the
shielding effect ?
a) First decreases then increases b) Increases
regularly c) First increases then decreases d) Remains constant ✔
15) Electronic configuration of four elements A,B,C,D
are as follows , which will be the most metallic ?
a) A = 2, 8, 4 b) B = 2, 8, 6 c) C = 2, 8, 8, 1 ✔ d) D = 2, 8, 8, 7
16) Which of the following has the highest melting
point ?
a) NaCl b) NaBrc) Nal d) NaF ✔
17) Out of Na , Mg , Na+1 & Mg+2 , the highest
ionization energy is of .
a) Na b) Na+c) Mg d) Mg+2 ✔
18) The second electron affinity of oxygen is .
a) -141 kJ mol-1 b) +780 kJ mol-1 ✔ c) -337 kJ mol-1 d)
+29 kJ mol-1
19) Which one of the following elements can have only
negative oxidation states .
a) Br b) F ✔ c) I d) Cl
20) In down cell CaCl2 is added to N2Cl to
a) Increases solubility b) Increase conductivity c)
Increase the dissociation d) Lower its melting point ✔ 21) In Down's cell
if moisture is present then , most likely products are .
a) Na , Cl2 ✔ b) NaOH , H2 , Cl2 c) Na , HCl d) H2O2
22) Sodium when dropped in water catches fire because
.
a) It is a metal b) It is highly electropositive in
nature c) It has high electron affinity d) H2 gas is eveloved in the reaction which catches fire due to exothermic
reaction ✔
23) Metallic luster exhibited by Na is explained by .
a) Diffusion of sodium b) Excitation of free protons
c) Oscillation of loose electrons ✔ d) Existence of body
centered cubic lattice
24) When NaCl is dissolved in water , sodium ion
becomes
a) Oxidized b) Hydrolyzed c) Hydrated ✔ d) Reduced
25) Which of the following reaches at the anode during
the electrolyses of brine in Nelson's cell . a) H2 b) Na c) Cl2 ✔ d) O2
26) In Nelson's cell the solution coming out of
cathode compartment contains 16% NaCl , the % age of NaOH in the solution is .
a) 11 % ✔ b) 84 % c) 50 % d) 2 %
27) Which is the most important by product in the
manufacturing of NaOH ?
a) Na2CO3 b) Cl2 ✔ c) KOH d) K2CO3
28) Sodium hydroxide is manufactured on large scale in
_________ .
a) Down cell b) Diaphragm cell ✔ c) Both A & B d)
None of these
29) The aqueous solution of Borax .
a) Acidic b) Alkaline c) Amphoteric ✔ d) Manual
30) Which is used in the leather industry
a) Tetra boric acid b) Borax ✔ c) Boric acid d)
Boric oxide
31) The compound formed in Borax bead test is .
a) Metal metaborate✔ b) Metal boride c) Metallic boron d) Boron oxide
32) The formula of pyroboric acid is .
a) H3BO3 b) HBO2 c) H2B4O7 d) H6B4O9 ✔
33) Borax can be prepared by reacting boric acid with
.
a) Caustic soda b) Caustic potash c) Soda ash ✔ d) Lunar caustic
34) Borax bead test is not performed for .
a) Cu b) Ni c) Zn ✔ d) Co
35) Borate glass contains .
a) H3BO3 b) Ca2B6O11 c) HBO2d) Borax ✔
36) The solubility of Borax at 1000C is .
a) 1400 gram in 100 gram of H2O b) 4 gram in 100 gram
of H2O c) 99 gram in 100 gram of H2O d) 99.3 gram in 100 gram of H2O ✔
37) Which of the following does not form boric acid ?
a) Borax + HCl b) Borax + H2SO4 c) Borax + H2O d)
Borax + Copper ✔
38) Which of the following is soluble in water ?
a) Dioxoboric acid b) Boric anhydride✔ c) Trioxoboric acid
d) Sodium Dioxoborate
39) Orthoboric acid when heated to red hot gives .
a) Boric anhydride✔ b) Pyroboric acid c) Metaboric acid d) Tetraboric
acid
40) If saturate solution of Borax is allowed to
crystallize above 620C , crystals obtained are . a) Decahydrate b) Pentahydrate✔ c) Hepthadrate d)
Anhydraous
41) Which of the following radicals give blue colour (
in cold and hot state ) in oxidizing flame when
subjected to Borax Bead test ?
a) Cu+2 ✔ b) Co+2 c) Cr+3 d) Ni+2
42) Which of the following is non metal ?
a) B ✔ b) Al c) Ga d) In
43) Aluminum is corroded in coastal places near the
sea , because protective oxide film .
a) Reacts with sea water b) Is removed by sea water c)
Reacts with sand particles d) Is attacked by salt present in sea water ✔
44) In electrolysis of alumina , cryolite is added .
a) To decrease the M.P of Al2O3 ✔ b) To minimize the
anodic effect c) To increase electrical conductivity d) To remove impurity form
alumina
45) Which of the following statements is correct ?
a) Aluminiumis used for making ships b) Aluminium is
less conductor of electricity than iron c) Aluminiumis
used to remove air bubbles form molten metals in their
extraction methods✔
d) Aluminium is an excellent oxidizing agent
46) When Al us added to KOH solution .
a) O2 is evolvedb) H2O is produced c) H2 is evolved✔ d) No reaction
occurs
47) Which of the following is not characteristic
property of carbon ?
a) Multiple bond fomation b) Catenation c) Highest
electronegative element of group d) Availability of d orbital for bonding✔
48) The melting point of Sn and Pb is less as compared
to group III elements because .
a) They are large in size b) They do not use four
valence electrons✔
c) They are metalloids d) They are all
metals
49) Opal is a hydrated variety of _______
a) Silicon b) Sandc) Quartz✔ d) None of these
50) Carbon have tendency of linkage of identical atoms
, which is called .
a) Catenation b) Self linkage c) Both A & B✔d) None of these
51) What is % age of calcium phosphate in bone ash ?
a) 20 b) 40 c) 80 ✔ d) 60
52) Which of the following is not the property of
phosphorous ?
a) It means light beaing b) Rich source of phosphorous
in bone ash✔
c) It does not exist free in nature d) It does not exist in allotropic
53) Phosphorous has the oxidation number +3 in .
a) Metaphosphoric acid b) Phosphorous acid✔ c) Orthophosphoric
acid d) Pyrophosphoric acid 54) Which allotropic form of phosphorus is very
reactive & poisnonous ?
a) Red b) Black c) Violet d) White✔
55) Molecular formula of white phosphorus is .
a) P4 ✔ b) P c) P3 d) P2
56) Which phosphorous is most stable ?
a) White b) Black ✔ c) Red d) All are equal
57) Which of the following shows phosphorescence ?
a) Yellow P b) Black P c) White P ✔ d) Red P
58) The most poisonous form of phosphorous is .
a) White ✔ b) Red c) Black d) Amorphous
59) In contact process inpurities of Arsenic are
removed by .
a) Fe(OH)3 ✔ b) Al(OH)3 c) Cr(OH)3 d) Fe2O3
60) The volatility of H2SO4 is low due to .
a) Strong bonds b) Covalent bonds c) High molecular
mass d) Hydrogen bonding ✔
61) Cons . H2SO4 dehydrate the oxalic acid into .
a) CO2 + H2O b) CO + H2O c) C + H2O d) CO + CO2 + H2O ✔
62) If current is allowed to pass through pure conc .
H2SO4 . It behaves as .
a) Good conductor b) Weak conductor c) Non conductor✔ d) Ionize into H+
& HSO4 -1 63) Which one of the following is wrong statement about H2SO4 ?
a) Sulphonating agent b) Reducing agent✔ c) Highly viscous d)
Oxidizing agent
64) Which compound will give carbon with concentrated
H2SO4 ?
a) Starch ✔ b) Ethy1 Alcohol c) Oxalic Acid d) Formic Acid
65) Which of the following is called oil of vitriol ?
a) H2S b) H2SO3 c) H2SO4 ✔ d) HNO3
66) At 180C the specific gravity of H2SO4 is .
a) 1.891 b) 1.834 ✔ c) 2.101 d) 1.740
67) When sugar in treated with Conc . H2SO4 , it
becomes black due to .
a) Decolourization b) Dehydration ✔ c) Hydrolysis d)
Hydration
68) Which of the gas cannot be dried over conc . H2SO4
?
a) SO2 b) N2 c) NH3 ✔ d) H2
69) Formula of oleum is .
a) H2SO4 b) H2S2O7 ✔ c) H2SO4 + SO3 d) None of these
70) Which halogen occur naturally in positive
oxidation state ?
a) F b) Cl c) Br d) I ✔
71) Which is the strongest oxidizing agent in the
following ?
a) I2 b) Cl2 c) F2 ✔ d) Br2
72) Which of the following halogens will not form
oxyacid ?
a) Cl b) F ✔ c) Br d) I
73) All halogens act as oxidizing agents when .
a) They combine with non - metals b) They combine with
metals c) They combine with noble gases d) Both A & C✔
74) Which silver salt is sparingly soluble in H2O ?
a) AgF b) AbBr c) AgCl ✔ d) AgI
75) In the preparation of Cl2 from HCl , MnO2 acts are
.
a) Reducing agent b) Dehydrating agent c) Oxidizing
agent✔
d) Catalytic agent
76) The Strongest acid in halogen acid is solution is
.
a) HF b) HCl c) HBr d) HI ✔
77) Which one is perchloric acid ?
a) HClOb) HClO2 c) HClO3 d) HClO4 ✔
78) Which one is chlorous acid ?
a) HClOb) HClO2 c) HClO3 d) HClO4 ✔
79) The weakest oxyacid of Cl is .
a) HclO ✔ b) HClO2 c) HClO3 d) HClO4
80) The decomposition of potassium chlorate is a
disproportionation reaction which gives . a) KCl + O2 ✔ b) KClO2 + KCl c)
KCl + Cl2 d) KClO + KCl
81) Which of the following cannot be bleasched by the
bleacing powder ?
a) Cotton b) Paper pulp c) Linen d) Silk ✔
82) For bleaching powder which statement is incorrect
?
a) Reacts with dilute acid to release Cl2 b) Highly
soluble in water ✔
c) Light yellow coloured powder d)
Oxidizing agent
83) Which acid has highest boiling point ?
a) HF ✔ b) HBr c) HCl d) HI
84) Oxidation state of Cu in K2[ Cu(CN)4 ] in.
a) +4 b) +3 c) +2 ✔ d) +6
85) Group VII-B of transition elements contains .
a) Cu , Ag , Au b) Mn , Tc , Re ✔ c) V , Nb , Ta d) Fe
, Ru , Os
86) Fe+3 is strongly paramagnetic and has .
a) 2 unpaired electrons b) 4 unpaired electrons c) 3
unpaired electrons d) 5 unpaired electrons ✔
87) Transition elements form complexes because they
have .
a) Small sizes b) Vacant d - orbitals✔c) Strong binding
energy d) Large nuclear charge
88) The maximum oxidation state is shown by which of
the following transition elements ? a) Chromium b) Iron c) Cobalt d) Managanese✔
89) Which one of the following ions is colourless ?
a) Sc+3 ✔ b) Ti+3 c) V+3 d) Cr+3
90) Which of the following pairs is strongly
paramagnetic ?
a) Mn+2 , Fe+2 b) Mn+3 , Fe+2 c) Mn+2 , Fe+3 ✔ d) Mn+3 , Fe+3
91) Zn+2 salts are colourless due to .
a) No unpaired d – electrons ✔b) All d - orbitals
are empty c) All d - electrons are unpairedd) Tow d - orbitals are hydridized
92) Which is more acidic oxide in following .
a) MnO b) Mn2O3 c) MnO2 ✔ d) Mn2O7
93) Steam cracking will produce .
a) Cyclic compounds b) Lower unsaturated bydrocarbons ✔ c) Aromatic
compoundsd) Branched compounds 94) Gasoline of higher octane number is produced
by .
a) Thermal cracking b) Catalytic cracking✔ c) Steam cracking d)
Reforming
95) The reaction C8H18 C3H6 + Fragments is .
a) Catalytic oxidation b) Isomerization c) Synthesis
d) Cracking ✔
96) Breaking down of large molecule by beating at high
temperature and pressure is called _________
cracking .
a) Thermal ✔ b) Catalytic c) Steam d) None of these
97) The fractional distillation of petroleum yield
only about _______ gasoline.
a) 10 % b) 20 % ✔ c) 30 % d) 40 %
98) -SH functional group is called
a) Carboxy 1 b) Nitroc) Mercapto ✔ d) Cyano
99) The group of -C \equiv N is .
a) Mercapto b) Cyano ✔ c) Nitro d) None of these
100) Which of the following is an example of alkanal ?
a) Acetaldehyde ✔ b) Alcohol c) Acetone d) Phenol
101) The state of hybridization of carbon atom in
Ethyne .
a) sp ✔ b) sp2 c) dsp2 d) sp3
102) The bond angle between any two Hybridized
Orbitals is of .
a) 1800b) 109.50 c) 1200 ✔ d) 107.50
103) Carbon atom of carboxuI group is .
a) sp3 hydridized b) sp3d hydridized c) sp2 hydridized
✔
d) sp hydridized
104) The state of hybridization of " C " in
ethane is .
a) sp3 ✔ b) sp c) sp2 d) dsp3
105) The state of hybridization of carbon in ethylene
is .
a) sp3 b) sp2 ✔ c) sp d) dsp2
106) The Carbon of CarbonyI Group is .
a) Sp3 Hybridized b) Sp Hybridized c) Sp2 Hybridized✔ d) dSp2 Hybridized
107) The state of hybridization of carbon atom in
ethane is
a) sp3 b) sp2 ✔ c) sp d) dsp2
108) Carbon atom in which of the following is sp2 -
hybridized
a) CH3CN b) CH CH c) HCOOH ✔ d) CH2Cl2
109) How many sigma electrons present in ethylene ?
a) 2 b) 5 c) 8 d) 10 ✔
110) Number of possible chain isomers of alkane C5H12
are .
a) 2 b) 3 ✔ c) 4 d) 5
111) Ethers show the phenomenon of
a) Position isomerism b) Metamerism c) Cis - trans
isomerism d) Functional group isomerism ✔
112) Both CH3COOH and CHOOCH3 show isomerism .
a) Postion b) Chain c) Geometric d) Functional group ✔
113) The hydrocarbon having octane number 100 is .
a) Neo - octaneb) n - hexane c) Neopentane d) Iso -
octane✔
114) The chain isomers shown by pentane are .
a) 2 b) 5 c) 4 d) 3
115) Which isomerism can be possible for 2 - chloro 3
- methyI butane ?
a) Functional group isomerism b) Position isomersm✔ c) Chain isomerism
d) Metamerism
116) n - butyI alcohol and diethyI ether are .
a) Geometric isomers b) Functional group isomers✔ c) Position isomers
d) Metamers
117) The compound having molecular formula C6H14 has
chain isomers .
a) 6 b) 4 c) 5 ✔ d) 3
118) Glucose and fructose are isomers .
a) Chain isomers b) Functional group isomers ✔ c) Position isomers
d) Metamers
119) The isomeris shown by alkanes is
a) Skeletal ✔ b) Position c) Geometric d) Metamerism
120) For a ketone having molecular formula C5H10O ,
the number of possible metamers are a) 2✔ b) 3 c) 4 d) 5
121) Alkenes are also called .
a) Paraffins b) Olefins ✔ c) Earbenes d) CarbonyI compound
122) Hydrolysis R-MgX gives .
a) Alkene b) Alkanes ✔ c) ALkyne d) Alcohol
123) Lindlar's catalyst is .
a) Ba/PbSO4 b) Pd/PbSO4 Quinone c) Quinone Pd/PbSO4 ✔ d) Pb/BaSO4 Quinone
124) Symmetrical alkanes are prepared by .
a) Kolbe's reaction b) Clemensen reaction c) Wurtz
reaction d) Both A & B✔
125) The most reactive halogen in the halogenation of
alkane under sunlight is .
a) Cl2 ✔ b) Br2 c) I2 d) None of these
126) Sabatier-Sendern's reaction can be used to
prepare .
a) Alkyne b) Alkanes ✔ c) Alkenes d) Alkenes and Alkynes
127) The dehydration of tertiarty alcohols is carried
out with .
a) 20 % H2SO4 ✔ b) 35 % H2SO4 c) 30 % H2SO4 d) 25 % H2SO4
128) Which one is not property or uses of mustard gas
?
a) Used in 1st world war b) High boiling liquid c)
Powerful vesicant d) High boiling gas ✔ 129) When I-chloropropane is reacted with alcoholic
KOH , the product obtained is .
a) Propane b) Propene ✔ c) Propyne d) Butane
130) Electrolysis of aqueous solution of potassium
acetate gives .
a) C3H8 b) C2H2 c) C2H4 d) C2H6 ✔
131) Baeyer's reagent is used to identify .
a) Ethene ✔ b) Methane c) Ethane d) Ethnol
132) When acetylene reacts with acetic acid , the
product form is .
a) Acrylic acid b) Acrylo nitrile c) VinyI acetate ✔ d) EthyI acetate
133) The presence of double bond in alkenes cannot be
identified by .
a) Br2 water b) KMnO4 + H2O c) Ozonolysis d) Tollen's
test✔
134) The most likely product of addition of H - Cl to
2-methyI-2-butene is .
a) 3 - Chloro - 2 - methyI butane b) 1 - Chloro - 2 -
methyI butane c) 2 - Chloro - 2 - methyI butane✔ d) 3 - Chloro pentane
135) The ease of dehydration of alcohol to produce
alkene is .
a) Primary > Secondary > Tertiary b) Secondary
> Tertiary > Primary c) Tertiary > Primary > Secondary d) Tertiary
> Secondary > Primary ✔
136) Addition of O2 in ethane in the presence of Ag
gives .
a) Ethylene oxide ✔ b) Ethane c) Ethanol d) Acetic acid
137) Which of the following when reacted with ozone
produces methanal ?
a) Methane b) Ethane ✔ c) Ethene d) Ethyne
138) Ozonolysis of ethene causes breaking of C - C
bond , the product is .
a) Formaldehyde✔ b) Ethylene glycol c) Acetaldehyde d) Ethylene
chlorohydrin
139) Which of the following gases is powerful vesicant
?
a) Marsh gas b) Mustard gas✔ c) Ozonide d) Butane
140) MethyI 1,3 Butadiene is called .
a) Stgrene b) Cumene c) Chloroperene d) Isoperene✔
141) Which of the following is the major product when
HBr reacts with 2-butene ?
a) 2-bromobutane✔ b) 1,1 bromobutane c) 1-bromobutane d) 1, 2
bromobutane
142) Which compound is the most reactive ?
a) Benzene b) Ethene✔ c) Ethane d) Ethyne
143) When calcium carbide is treated with water we get
.
a) EthyI formate b) Acetaldehyde c) Ethylene d) Ethyne
✔
144) Which of the following is used for the manufacturing
of polyvinyI chloride ?
a) Ethylene b) Propylene c) Ethyne ✔ d) Ethane
145) 2,3 - dibromo butane gives 2-butyne when it is
treated with .
a) Zn b) H2SO4 c) Aqueosu KOH d) Alcohol + KOH ✔
146) Ethyne when passed into the solution of cuprous
chloride and NH4Cl , it gives .
a) MethyI nitrile b) Acrylonitrile c) VinyI Acetylene ✔ d) Benzene
147) Which of the following is liquid at room
temperature ?
a) Ethyne b) Propyne c) Butyne d) Pentyne ✔
148) The number of sigma and Pi bond in 1 - butene 3 -
yne are .
a) 8 - sigma and 2 Pi b) 7 - sigma and 3 Pi✔ c) 5 - sigma and 5
Pi d) 6 - sigma and 2 Pi
149) It is dangerous to work with liquid C2H2 because
.
a) It readily catches fire b) It is explosive ✔ c) It is highly
volatile d) It is not very reactive 150) Addition of water to acetylene takes
place in presence of .
a) Ni b) HgSO4/H2SO4 ✔ c) ZnCl2 d) Cu
151) Polymerization of acetylene forms .
a) Propane b) Butane ✔ c) Benzene d) Acetaldehyde
152) Conversion of unsaturated hydrocarbon to
saturated hydracarbons in presence of catalyst is called . a) Halogenation b)
Hydrogenation✔
c) Hydroxylation d) Dehydrogenation
153) Benzene can be prepared by polymerization of .
a) Ethene b) Ethane c) Acetylene ✔ d) Propene
154) The reaction of bromobenzene with ethyI bromide
in the presence of Na in dry ether will give . a) Toluene b) Benzene c) Xylene
d) EthyI benzene ✔
155) Oxidation of ethyI benzene in presence of KMnO4
gives .
a) Phenol b) BenzyI alcohol c) Benzoic acid ✔ d) Maleic anhydride
156) Which one is not a meta directing group ?
a) -COOH b) -CHO c) -CORd) -NH2 ✔
157) Molecular formula of benzyI chloride .
a) H5C6CCl3 b) H5C6HCl2 c) H5C6CH2Cl ✔ d) H5C6H2CH2Cl
158) The \pi - electrons of benzene are not readily
available for weak electrophiles because is has . a) sp2 hydridization b)
Planar hexagonal structure c) Delocalization of electrons ✔d) Conjugation 159)
Which one is a Friedel Crafts catalyst ?
a) PCl5 b) PCl3 c) AlCl3 ✔ d) Al(OH)3
160) The reaction of benzene with ozone finally gives
.
a) Glyoxal b) Glycol c) Glycerol d) Benzoic acid
161) Which one is not an ortho and para directing
group ?
a) -NH2 ✔ b) -OH c) -OCH3 d) -CHO
162) Nitration of Nitrobenzene at 950C will give .
a) 1,2 dinitrobenzene b) 1,4 dinitrobenzene c) 1,3
dinitrobenzene✔d)
1,2,6 dinitrobenzene
163) Which of the following is not easily sulphonated
?
a) Para-xylene b) Meta-xylene c) Ortho-xylened)
Benzene ✔
164) Which of the following is not an electrophile ?
a) BF3 b) AlCl3 c) ZnCl2 d) NH3 ✔
165) The compound that is nitrated with difficult is .
a) Toluene b) Nitrobenzene ✔ c) Benzene d) Phenol
166) Which of the following groups is an ortho and
para directing in disubstitution benzene ? a) -COOH b) -N+R3 c) NH2 ✔ d) -NO2
167) If B forms glyoxal when it is treated with ozone
, then B is
a) Ethene b) Ethyne c) Benzene ✔ d) Cyclohexane
168) Ortho and para derivative are obtained by
halogenation of .
a) Nitrobenzene b) Toluene ✔ c) Benzaldehyde d)
Benzene
169) The reactivity of alkene is due to ________ and
availability of \pi electron for electrophilic reaction .
a) \pi bond ✔ b) Covalent bond c) Ionic bond d) None of these
170) ______ does not undergo polymerization .
a) Benzene ✔ b) Alkene c) Alkane d) None of these
171) Benzene is highly ________ compound and at the
same time it is very stable molecule . a) Saturated b) Unsaturated ✔ c) Organic d) None
of these
172) Benzene is resistant to ________
a) Halogenation b) Sulphonation c) Oxidation ✔ d) Reduction
173) Which compound is the most reactive one ?
a) Benzene b) Ethene ✔ c) Ethane d) Ethyne
174) When ethyI iodide reacts with sodium methaoxide
it gives .
a) MethyI ethyI ether✔b) EthyI iodide c) DiethyI ether d) Ethernol
175) Best reagent for preparing a chloroalkane from
alcohol is .
a) SOCl2 ✔ b) ZnCl2/HCl c) PCl3 d) Cl2/CCl4
176) AlkyI halide can be prepared by the halogenation
of ______
a) Alkane ✔ b) Alkene c) Alkyne d) None of these
177) Alcohols may be converted to the corresponding
alkyI halides by the action of halogen acid in the presence of .
a) V2O5 b) PCl3 c) ZnCl2 ✔ d) None of these
178) Alcohols react with SOCl2 in the presence of
________
a) ZnCl2 b) Pyridine ✔ c) Amylase d) None of these
179) SN2 Mechanism involves .
a) 1st order kinetics b) 2nd order kinetics✔ c) 3rd order
kinetics d) Zero order kinetics
180) An alkyI halide can be converted into alcohol by
.
a) Addition b) Substitution ✔ c) Elimination d)
Dehydrogenation
181) In SN1 reaction , the first step is the formation
of .
a) Carbanion b) Free radical c) Carbocation ✔ d) None of these
182) Which of the following is a poor leaving group ?
a) -HSO4 b) -I c) -NH2 ✔ d) -Br
183) Which of the following compounds undergo an
elimination reaction when treated with hot ethanolic potassium hydroxide ?
a) Br - CH2 - Brb) Br3C - CBr3 c) (CH3)2C = CBr2 d)
CH3 - CH2 – Br ✔
184) SN2 reactions can be carried out with .
a) Primary alkyI halide ✔ b) Tetiary alkyI halide c) Secondary alkhyI halide d)
Any type of alkyI halide 185) \beta - elimination is bimolecular elimination
when it involves .
a) First order kinetics b) Third order kinetics c)
Second order kinetics ✔
d) Zero order kinetics 186) Reaction of alkyI halide with NH3 gives .
a) Nitriles b) Amines ✔ c) Nitro alkane d) Imine
187) Hydrolysis of Ter. ButyI bromide follows SN1
mechanism . The rate is
a) Greater with OH- b) Greater with alkhyI halide ✔c) Greater with H2O
d) Equal with OH- and H2O 188) Which is a good leaving group ?
a) I- ✔ b) OH- c) RO- d) NH2 -
189) What will be the mechanism of the reaction ?
C2H5I + 2NH3 \rightarrowC2H5NH2 + NH4I
a) SN1 b) Nucleophilic addition c) SN2 ✔ d) Electrophilic substitution
190) During SN2 mechanism carbon atom changes its
hybridization from .
a) sp sp2 b) sp2 sp3 ✔ c) sp3 sp2 d) sp3 sp
191) In elimination reaction of alkyI halide , the
site more susceptible for the nucleophilic attack is . a) - carbon b) -
hydrogenc) - carbon d) - hydrogen ✔
192) Which one may not act as electrophile ?
a) NH4+ b) BF3 c) NH3 ✔ d) H+
193) Which one is not a nucleophile ?
a) NH3 b) H2S c) H2O d) BF3 ✔
194) SN1-reactions are easily given by .
a) Primary alkyI halides b) Secondary alcohols c)
Secondary alkyI halides d) Tertiary alkyI halides ✔ 195) CH3 - CH2 - CH2
-CH2 - Cl on reaction with alcoholic KOH gives
a) 2-Butanol b) 2-Butene c) 1-Butene ✔ d) 2-Butanol
196) In ter-butyI alcohol , the tertiary carbon is
bonded to .
a) Three hydrogen atoms b) One hydrogen atomsc) Two
hydrogen atomsd) No hydrogen atoms ✔ 197) Lucas reagent used to distinguish the pri , sec
& ter alcohol consists of .
a) HBr & MgCl2 b) HBr & ZnCl2 c) HCl &
ZnCl2 ✔
d) HCl & MgCl2
198) Primary , secondary and tertiary alcohols can be
distinguished by .
a) Tollen's Test b) Lucas Test ✔ c) Fehling Solution
Testd) Iodoform Test
199) Which compound will not give iodoform test on on
treatment with I2.NaOH ?
a) Acetaldehyde b) Acetone c) Butanone d) Methanol ✔
200) Which liquid is called wood spirit ?
a) CH3 – OH ✔ b) C2H5 - OH c) CH3COOH d) CH3 - O - CH3
201) ______ is used as a solvent for fats oils ,
paints , varnishes .
a) Methanol ✔ b) Ethanol c) Propanol d) None of these
202) ______ is used as drink in some countries .
a) Methanol b) Ethanol ✔ c) Propanol d) None of these
203) Ethanol is also used in the _________ of
specimen.
a) Preparation b) Preservation ✔ c) Both A & B d)
None of these
204) Dry distillation of calcium acetate gives .
a) Methanal b) Ethanal c) Acetone ✔ d) Methanol
205) Dry distillation of calcium formate gives
a) Methanol b) Ethanal c) Acetone d) Methanal ✔
206) Formamint contains .
a) Formaldehyde and Lactose ✔ b) Formaldehyde and
Fructose c) Formaldehyde and Menthol d)Formaldehyde and Ascorbic acid
207) Catalyst used for the laboratory preparation of
formaldehyde is .
a) Cd-asbestos b) Pb-asbestos c) Pt-asbestos ✔ d) Cu-asbestos
208) C = O and C = C bonds are differentiated by .
a) Hydridization of C-atom b) Bond length ✔ c) Planar structures
d) Undergo addition reaction
209) The oxygen atom has a partial negative charge on
it is a .
a) Electrophilic b) Nucleophilic ✔ c) Both A & B d)
None of these
210) The nucleophilic addition reactions of carbonyI
group are catalyzed by _________
a) Oxygen b) Acids c) Bases d) Both B & C✔
211) Aldehyde react with hydroxyI amine in acidic
solution to give .
a) An oxime ✔ b) Aldolc) Polymer d) Acetic acid
212) Formaldehyde gives metaformaldehyde on
a) Oxidation b) Condensation c) Cyclization d)
Polymerization✔
213) Formaldehyde reacts with Grignard's reagent to
produce .
a) Primary alcohols✔ b) Secondary alcohols c) Tertiary alcohols d) Sterols
214) The general formula for haloform is .
a) CHX3 ✔ b) CH2X2 c) CH3Xd) CX4
215) In the manufacturing of plastic such as bakelite
, which of the following substance is used ? a) Formic Acid b) Formaldehyde ✔ c) Acetic Acid d)
Acetaldehyde
216) Which one has yellow or orange crystalline ppt ?
a) Acetone hydrazone b) Ethanal oxide c) 2 , 4-DNPH ✔ d) Bisulphite
addition product 217) The compound which reacts with Tollen's reagent .
a) HCHO ✔ b) H3C.CO.CH3 c) H3C.COOH d) H3C.CO.C2H5
218) Which of the following compound will react with
Fehling's solution ?
a) HCOOH b) H3O.CHO ✔ c) H3CCOOH d) H3CO - CH3
219) Aldehydes and Ketones can be differentiated from
each other by using .
a) 2,4 dinitophennyI hydrazine b) Hydrazine c)
HydroxyI amine d) Fehling solution test ✔
220) Which of the following reagents is composed of
ammonical silver nitrate ?
a) Benedict's Solution b) Tollen's Reagent ✔ c) Fehligh Solution
d) Molish Reagent
221) Tollen's reagent is .
a) Alkaline solution containing potassium tartarate b)
Alkaline solution containing potassium citrate c) Ammonical silver nitrate ✔ d) Ammonical Cu2Cl2
222) Which of the following aldehydes is used to
prepare urotropine medicine ?
a) Acetaldehyde b) Acetone c) Formaldehyde ✔ d) EnthyI alcohol
223) _______ is used silvering of mirror .
a) Acetaldehyde b) Ketone c) Formaldehyde ✔ d) Both A & C
224) ______ % aqeous solution called formalin .
a) 30 % b) 40 % ✔ c) 50 % d) 60 %
225) ________ is used in making formamint .
a) Ketone b) Acetaldehyde c) Fomaldehyde ✔ d) None of these
226) _______ is used in the processing of
anti-poliovaccine.
a) Formaldehyde✔ b) Acetaldehyde c) Ketone d) None of these
227) ________ is used to make phenolic resins and
synthetic drugs .
a) Acetaldehyde ✔ b) Ketone c) Both A & C d) None of these
228) Ethanol can be converted into Ethnoic acid by .
a) Fermentation b) Hydration c) Hydrogenation d)
Oxidation✔
229) Organic compounds containing -CN group are called
.
a) Cyanides b) Nitrites c) Nitrates d) Nitriles ✔
230) Which of the following alcohols are readily
oxidized to give carboxylic acids an reacting with K2Cr2O7 ?
a) Primary ✔ b) Secondary c) Tertiary d) Dioles
231) AlkyI nitriles can be prepared by treating alkyI
halides with alcoholic .
a) Calcium cyanide b) Potassium cyanide✔c) Phosphorous
cyanided) Calcium carbide
232) In the formation of ester from carboxylic acids ,
the -OH group is replaced by .
a) -R b) -COOR c) –OR ✔ d) -COR
233) Acetaldehyde and acetic acid can be distinguished
with .
a) Na2SO4 b) NaOH c) AgNO3 + NH4OH ✔ d) Help of litmus
234) Slight oxidation of primary alcohol gives .
a) Ketone b) Organic acid ✔ c) Aldehyde d) An
ester
235) Crboxylic acids are dehydrated on heating
strongly in the presence of .
a) Al2O3b) P2O5 ✔ c) Conc.H2SO4 d) Fe2O3
236) The reactivity of carboxylic acid is due to
presence .
a) Carbolic acid b) Carboxyl group✔ c) Both A & B d)
None of these
237) The carboxyI group shows the chemistry of both
carboxyI and ______ groups .
a) HydroxyI ✔ b) AcetyI acid c) Carboxylic acid d) None of these
238) The carbon atom of a carboxyI group is hybridized
.
a) sp b) sp2 ✔ c) sp3 d) sp4
239) Which of the following reactions involves
displacement of OH group of the carboxylic acids ?
a) RCOOH + Na b) RCOOH + NaHCO3 c) RCOOH + NaOH d)
RCOOH + PCl5 ✔
240) The flavor of octylacetate is .
a) Orange ✔ b) Apricot c) Banana d) Jasmine
241) Ester benzyI acetate has the flavour
a) Orange b) Jasmine ✔ c) Apricot d) Banana
242) Which of the following ester has banana flavour ?
a) EthyI butyrate b) OctyI acetate c) AmyI acetate ✔ d) ButyI acetate
243) Amylacetate has the flavor of .
a) Apricot b) Banana ✔ c) Orange d) Jasmine
244) A carboxylic Acid is treated with lime water ,
the product is distilled in dry state , if forms acetone ,
the carboxylic acid is
a) HCOOH b) CH3COOH ✔ c) Propionic acid d) Succinic acid
245) Vinegar is dilute solution of Acetic Acid .
a) 1 - 5 % b) 4 - 10 % ✔ c) 10 - 15 % d) 10 - 20 %
246) Acetic Acid is obtained when .
a) Methanol is oxidized b) Ethanol is oxidized✔c) Methanol is
reduced d) Methanol is fermented
247) Acetic usually exists as .
a) Monomer b) Dimer c) Trimer ✔ d) Polymer
248) Acetic acid exists as dimer in benzene due to .
a) Presence of hydrogen at -carbon b) Presence of
carboxylic groupc) Condensation reaction d) Hydrogen bonding✔
249) Two moles of acetic acid are heated with P2O5.
The product formed is .
a) Butanoic Acid b) Acetic Anhydride✔ c) Ethanol d)
Ethanal
250) Acetic Acid reacts with LiAlH4 to give .
a) C2H6 b) C3H7OH c) C6H5 - CH2 - OH d) C2H5OH ✔
251) When aqueous solution of potassium salt of acetic
acid is elecrolyzed the gas produced is . a) Methane b) Ethane ✔ c) Ethene d) Ethyne
252) The reaction of acetic acid with sodium metal
gives .
a) CO b) CO2 c) HCHO d) H2 ✔
253) Acetic acid was first isolated from .
a) Butter b) Vinegar ✔ c) Milk d) Red ant
254) The nutrients which are required in very small
amount for the growth of plants are called . a) Macronutrients b) Essential
nutrients c) Micronuttrients ✔ d) Non-essential nutrients
255) Which of the following fertilizers contains
46\gamma N ?
a) NH3 b) (NH2)2CO ✔ c) NH4NO3 d) KNO3
256) Which of the following is a macronutrient .
a) Iron b) Zinc c) Chlorine d) Calcium ✔
257) Good fertilizer must be .
a) Cheap ✔ b) Expensive c) Both A & B d) None of these
258) Good fertilizer must be soluble in .
a) Water ✔ b) Alcohol c) Ether d) None of these
259) One of the following is orgillaceous material .
a) Clay b) Marble c) Marine shell ✔ d) Lime
260) Cement was introduced by mason .
a) D.H, Whove b) Humphy Davy c) Joseph Aspdin ✔ d) Friedrick
Mieschar
261) The diameter of rotary kiln in the manufacture of
cement is .
a) 1 to 2 feet b) 2 to 4 feet c) 4 to 8 feet d) 8 to
15 feet ✔
262) The length of rotary Kiln in manufacture of cement
is .
a) 100 - 300 ft b) 100 - 200 ft c) 300 - 500 ft ✔ d) 400 - 600 ft
263) The percentage of gypsum in cement is .
a) 2 % ✔ b) 10 % c) 3 % d) 5 %
264) Setting process of cement is based upon.
a) Hydrolysis b) Dehydration c) Hydration d)
Hydrolysis and hydration ✔
265) The percentage of Silica in cement is .
a) 62 % b) 22 % ✔ c) 7.5 % d) 50 %
266) The main function of burning in rotary kiln is .
a) To reduce the impurities b) Combination of
different oxides like CaO , SiO2 , Fe2O3 and Al2O3✔ c) To dry the moisture of slurry d) To decompose limestone
to unslaked lime
267) Which of the following substances has greater
percentage in cement ?
a) MgO b) Al2O3 c) CaO ✔ d) SiO2
268) The percentage of alumina in potralnd cement is .
a) 22 % b) 3.5 % c) 2.5 % d) 7.5 % ✔
2nd Year Important Chemistry Short Questions
Q.NO.2 (CH # 1,2,3,4,15)
1. The first electron affinity of oxygen is in
negative sign but the second one is positive Why?
2. Diamond is a non-conductor but graphite is a good
conductor Why?
3. Why oxidation number of noble gases is usually
zero?
4. Why the metals are good conductors?
5. Give reason that hydration energy of Al3+ ions more
than Mg2+ ions?
6. Define hydration energy with an example?
7. Define ‘‘Electron Affinity” Why second electron
affinity value is positive?
8. Hydration energy of the following ions are in the
order Explain Al+3>Mg+2>Na+
9. Why the ionic radius of a positive ion is smaller
than that of its neutral atom?
10. Why first ionization energy of Mg is greater than
that of Na?
11. Why size of an anion is always greater to that of
its parent atom?
12. How does hydrogen resemble with alakali metals?
13. Give any two resemblances of hydrogen with group
IV-A
14. Give four points in which Lithium differ from its
own family members
15. Write formulas of Borax and Chile saltpeter?
16. Give two similar properties of Lithium and
Magnesium
17. Write chemical formulas of the following metals?
(i) Beryl (ii) Barite
18. Write formulas of Beryl and Sylvite
19. What happens when? (i) Lithium hydride is treated
with water (ii) lithium carbonate is heated
20. What happens when: i) Li2CO2 is heated ii) Na2CO3
is heated
21. Write down formulae of the minerals: a) Dolomite
b) Asbestos
22. What are advantages of Down’s cell for the
preparation of sodium on commercial scale?
23. What are the two major problems faced during the
working of diaphragm cell?
24. Write four uses of Borax?
25. What is chemistry of Borax bead test?
26. How does H3BO3 act as an acid?
27. What is Borax bead Test?
28. Justify the solubility of borax changes with
temperature
29. What are uses of Boric acids?
30. Why boric acid can't be titrated by NaOH?
31. What is effect of Heat on Boric acid?
32. How Aluminum reacts with aqueous sodium hydroxide?
33. Give any four uses of Aluminum
34. Aluminum sheets are said to be corrosion free Why?
35. Aluminum when burn in oxygen an intense white
light is produced Explain
36. Give two similarities between carbon and
silicon’s?
37. Write formula of the following ores (i) Talc (ii)
Zircon
38. How does NO act as oxidizing agent?
39. What happens when N2O is dissolved in water?
40. How HNO3 can be prepared in the laboratory?
41. Write four used of HNO3?
42. How does HNO2 acts as a reducing agent?
43. What is Aqua Regia? How does it dissolve noble
metals?
44. Give the reaction of HNO3 with carbon and sulphur
45. Why dinitrogen oxide is called Laughing gas?
46. What is the effect of dil HNO3 on: (a) Mg (b) Cu
47. What is meant by fuming nitric acid?
48. Write two reactions for the preparation of
phosphorus acid
49. Give definition of allotropy. Write allotropes of
phosphoric
50. How H3PO4 is prepared on large scale?
51. P2O5 is powerful dehydrating agent Justify it with
two chemical equations
52. Give reaction of P2O5 with (a) HNO3 (b) C2H5OH
53. Give reaction of P2O5 with cold and hot water
54. How does P2O3 react with water in cold and hot
states?
55. Orthophosphoric acid is a weak tribasic acid Prove
it giving reactions with NaOH
56. Write two points of differences between Red and
White Phosphorus
57. Write down two chemical equations which show that
H2SO4 is dehydrating agent
58. Write two SO3 dissolved in H2SO4 and not in water?
59. Give reactions of conc H2SO2 with oxalic acid and
formic acid
60. H2SO4 acts as an oxidizing agent. Write two
reactions
61. Justify that H2SO4 is king of chemicals
62. Why SO3 gas is dissolved in H2SO4 but not in water
in contact process
63. How does H2SO4 react with: (a) Zn (b) Cu
64. What are micronutrients and macronutrients?
65. What are micronutrients required for proper growth
of plants?
66. What is the role of potassium in growth of plants?
67. How urea is prepared from Ammonia?
68. What do you mean by prilling of urea?
69. What is the importance of Potassium Fertilizer?
70. Give significance of potash fertilizer
71. Define DAP. Write reaction for its preparation
72. What is the role of phosphorus in proper growth of
plants?
73. How NH3 is given to the plants? Give its
composition
74. What is Cement? Which raw materials are used for
its preparation?
75. What is difference between Clinker and Cement?
76. Describe the average composition of Portland
cement
77. Define clinker How it is converted to cement?
78. Explain reactions taking place in first 24-hours
during setting of cement
79. What is meant by setting of Cement?
80. How Portland cement is made? Why gypsum is added
in the cement?
Q.NO.3 (CH #5,6,9,12,13)
1. Why HF is a weak acid than other Halogens acids?
2. Give reason why fluorine is gas iodine is solid?
3. How does fluorine differ from its family members?
4. Describe two uses of helium.
5. Halogens are strong oxidizing agents justify.
6. Why oxidizing power of F2 is higher than other
halogens?
7. Why Iodine has metallic luster?
8. HF is a weak acid. Why?
9. Write four uses of Bleaching powder.
10. Write four properties of hydrogen fluoride.
11. Describe H-Bonding in HF molecule.
12. What is halothane? Give its two uses.
13. Reaction of Cl2 with aqueous solution of NaOH at
15oC is a disproportionation reaction. Justify.
14. Perchloric acid is considered as a valuable
analytical reagent. Why?
15. Write any two important applications of helium.
16. How bleaching powder can act as an oxidizing
agent?
17. Give reaction of bleaching powder with NH3 and
HCl.
18. Write four uses of Halogen.
19. What is bleaching powder? How it is prepared?
20. What are Freons and Teflon?
21. How XeF2 and XeF4 can be prepared?
22. Complete the following reaction. (a) XeF4 + NH3 ?
(b) XeF4 + Hg
23. Write down the reaction of chlorine with cold and
hot NaOH.
24. Give reason oxidation powder of halogens increase
F2 > Cl2 > Br2 > I2
25. Complete the following reactions. (a) CaOCl2 +
H2SO4 ? (b) CaOCl2 + 2HCl
26. What are the various allotropic forms of Group VIA
elements of periodic table
27. HF is less viscous liquid than water. Why?
28. Write two uses of helium.
29. Complete the following reactions: (a) KClO4 (s) +
H2SO4 (conc.) (b) XeF6 + H2
30. Give two reactions to show H2SO4 as a dehydration
agent.
31. What are polycyclic aromatic hydro-carbons? Give
two examples.
32. How Aromatic Hydrocarbons are classified?
33. Write structural formula of: a) Nephthalene b)
Diphenyl methane
34. Describe X-rays structure of Benzene.
35. How is the straight chain structure of benzene
ruled out?
36. How will you prove that benzene has cyclic
structure?
37. What is aromatization?
38. How benzene is prepared from sodium benzoate and
phenol?
39. What is Wurtz-Fitting reactions?
40. What happens when benzene is heated with conc.
H2SO4 at 80oC?
41. Define meta-directing groups. Give two examples.
42. What does happen to benzene during Friedel Craft's
reaction? Give mechanism of one reaction.
43. Give the mechanism of Nitration of benzene.
44. What is the general pattern of reactivity of
benzene towards electrophiles?
45. What do you know about ozonolysis?
46. What happens when acidified KMnO4 is added to
methyl benzene and ethyl benzene?
47. Why hydroxyl group (OH) is other and para
directing group?
48. Benzene is less reactive than Alkene, why?
49. What is difference between Aldehyde and Ketone?
50. How formaldehyde and acetaldehyde undergo
polymerization?
51. How formalin is prepared on the commercial scale
from methyl alcohol?
52. How formaldehyde is prepared in laboratory?
53. How will you distinguish between 2-pentanone and
3-pentanone?E
54. Give reactions of Aldehyde with HCN and CH3 – CH2
– OH.
55. How aldehyde react with hydrazine? Give its
mechanism?
56. What is ''Haloform Reaction''? Give its uses.
57. Give the mechanism of Cannizzaro’s reaction.
58. Define aldol Condensation.
59. How aldehyde reacts with Ammonia derivative? Give
its general mechanism?
60. What are condensation reactions?
61. Complete the reaction. i) CH3CHO + C2H5OH to? ii)
CH3CHO + NH2OH to?
62. Give the mechanism of addition of HCN to Acetone.
63. How acetone is oxidized with K2Cr2O7 / H2SO4?
64. Justify that aldehydes with no \propto-hydrogen
give Cannizaro’s reaction.
65. Give mechanism of addition of HCN to acetaldehyde.
66. Discuss oxidation of Ketones with K2Cr2O7/H2SO4
67. How will you prepare ethanaloxime from an
aldehyde?
68. Why formaldehyde does not show Aldol Condensation?
69. What is iodoform test? Give two uses of it.
70. Write composition of Tollen's reagent? And which
organic compounds are usually identified by it. 71. Why Tollen’s test is also
called silver mirror test?
72. What is sodium bisulphite test?
73. Discuss the reaction of an aldehyde with Tollen’s
reagent.
74. What is silver mirror test? Give an example.
75. Write four important uses of Acetaldehyde.
76. What happens when ammonium acetate is heated?
77. Write the formula of: a) Benzoic acid b) Pthalic
acid
78. How is carboxylic prepared from Grignard's
reagent?
79. How carboxylic acids are prepared by the oxidation
of alkenes?
80. Why does mostly carboxylic acid exist as dimers?
81. Which ester gives banana and orange smell?
82. Write down mechanism of the reaction of SOCl2 with
acetic acid.
83. Write the mechanism of reaction between acetic
acid and Ammonia.
84. How acetic acid reacts with: a) PCl5 b) SOCl2
85. Write equation for reaction of acetic acid with
sodium carbonate.
86. How acetic acid is converted into ethanol?
87. How will you convert acetic acid into methane?
88. What is vinegar? How is it prepared from ethyl
alcohol?
Q.NO.4 (CH # 1,2,3,4,15)
1. Define catenation.
2. What do you know about cracking of petroleum?
Explain.
3. Differential between Homocyclic or Heterocyclic
compounds.
4. What are Alicyclic compounds? Give two examples.
5. What are homocyclic compounds? Give two examples.
6. What are Amines and Imines? Give one example of
each.
7. Define functional group. Give two examples of
oxygen containing functional group.
8. Draw the structure of C2H5 and indicate bond
angles?
9. Define the terms: a) Fractional Distillation b)
Hybridization
10. Define metamerism with example.
11. Explain geometrical isomerism with example.
12. What are Isomerse and Tautomers?
13. Describe position isomerism with example.
14. What are the conditions for cis-trans isomerism?
15. 1-Butane does not show cis-trans isomerism but
2-butene does. Justify the statement.
16. Why compounds containing (C=C) bond show geometric
isomerism?
17. Define Cis-Trans Isomerism. Give one example.
18. Alkanes are less reactive than Alkenes, comment.
19. How methane is converted to formic acid.
20. Give four uses of methane.
21. What is heat of combustion?
22. What is Baeyer's test to check the presence of
carbon-carbon double bond?
23. What are clemmensen and Wolf-Kishner reduction
reactions? How they differ?
24. Write down mechanism for the Kolbe's electrolytic
method for the preparation of alkanes.
25. What is Raney-Nickel? Where it is prepared?
26. What is catalytic hydrogenation? Give an example.
27. Give four uses of ethene.
28. Give mechanism of bromination of ethene.
29. Write chemical reaction for the preparation of
propene from: (i) CH3-CH2-CH2-Br (ii) CH3-CH2-CH2-OH 30. Why alkenes are called
elefins?
31. Give four uses of Ethyne?
32. What is polymerization? How high quality
polyethene is prepared from ethene?
33. How does Acetylene react with HBr?
34. Give reactions of HCN and NH3 with CH = CH. Also
mention Reaction Conditions?
35. How Ethyne is prepared on Industrial Scale?
36. What is hydrogenolysis? Give an example.
37. Why alkanes are less reactive organic compounds?
38. What happens when vic-dihalide is treated with Zn-dust?
39. When double bond and triple bonds are present in a
compound, how are they named?
40. Write down structural formula of: a) Vinyl
chloride b) Vinyl Cyanide
41. Why does Alkane show least-reactivity?
42. How would you prepare acetone from propyne?
43. Write two identification tests of 1-alkynes.
44. Benzene is polymer of acetylene. Justify.
45. Distinguish ethene from ethyne by a chemical
reaction.
46. Why alkynes are slightly acidic in nature? Justify
with an example.
47. What are primary and tertiary alkyl halides? Give
one example each.
48. Define primary alkyl halide and secondary alkyl
halide with one example.
49. Give reactions of ethyl bromide with a) CH3COONa
b) Zn / HBr
50. How does ethyl alcohol react with H2SO4 in two
different ways?
51. Give an excellent method to preparation simple
Alkyl Iodide.
52. Describe the best method for preparation of alkyl
halides.
53. Give mechanism of SN1 reactions.
54. Give only mechanism for SN2 reactions.
55. What is leaving group and substrate?
56. Why does SN2 mechanism give a product with
inversion of configuration? Show with one reaction.
57. Convert ethyl bromide into: i) Ethane b) n-Butane
58. Define nucleophile and substrate with an example.
59. Describe mechanism of E2 reactions of alkyl
halide.
60. Describe the mechanism of E1 reaction.
61. How does alkyl halide react with sodium lead
alloy?
62. Distinction between alcohol (CH3CH2OH) and Phenol
(C6H5 – OH).
63. Ethyl alcohol is a liquid while methyl chloride is
a gas. Give reason.
64. Prepare each of following compounds from
acetaldehyde: a) Lactic acid b) Acetic acid
65. Write structural formula of the compounds. i)
Carbolic acid ii) Glycerol
66. Write the name and structures of two polyhydric or
Polyhydroxy alcohols.
67. 1What is difference between Monohydric and
polyhydric alcohols? Give one example of each.
68. Define fermentation, give its conditions.
69. Absolute alcohol cannot be prepared by
fermentation process. Why?
70. Ethanol gives different products with conc. H2SO4
under different conditions. Justify it.
71. Write equation for reactions of C2H5OH with PBr3,
PCl5
72. Give oxidation of primary and secondary alcohols.
73. How wood-spirit is prepared from water gas?
74. Ethanol has higher boiling point than diethyl
ether. Give reason.
75. What is rectified spirit? How is absolute alcohol
obtained from it?
76. Distinction between methanol (CH3OH) and ethanol
(CH3CH2OH).
77. What is Lucas test?
78. Give any four uses of methyl alcohol.
79. Give reaction of: i) Phenol with zinc ii) Benzene
with SO3.
80. Prepare the following compounds from phenol: i)
2,4,6-Trinitro phenol ii) Benzene
81. Give reaction of phenol with: a) Bromine water b)
Conc. H2SO4
82. Describe method for preparation of phenol from
sodium salt of benzene sulphonic acid.
83. Phenol behaves as an acid, explain.
84. How phenol can be converted into Benzene?
85. How does picric acid synthesis take place?
86. Give the reactions of phenol with conc. H2SO4 and
acetyl chloride.
2nd Year Important Long Questions
LONG Q.NO.5
1. What is Mendeleev’s periodic table? Discuss improvements
in Mendeleev’s periodic table.
2. Explain the position of hydrogen over its group of
periodic table with two similarities and two differences.
3. Discuss the position of hydrogen over VII-A group
elements.
4. Explain similarities of hydrogen with halogens and
dissimilarities with alkali metals.
5. Why hydrogen cannot be placed above alkali metals
and halogens?
6. Give eight points of differences between Lithium
and other members of the family?
7. Describe the process for the preparation of sodium metal
on industrial scale by Down’s cell? What are
advantages of this process?
8. Describe the two problems involved in the
manufacture of caustic soda by Nelson cell and how these problems are solved.
9. Describe the commercial preparation of sodium hydroxide
by Diaphragm cell with diagram.
LONG Q.NO.6
1. What happen when dil HNO3 and Cinc. HNO3 react with
Cu , Hg , Sn and Zn.
2. Write equation for the reaction of Conc. HNO3 with:
(i) HI (ii) Sn (iii) Cu (iv) Zn
3. Describe Birkeland and Eyde’s process for the
manufacture of Nitric acid.
4. Describe eight points of similarities of oxygen and
Sulphur.
5. Give four reactions of H2SO4 as an acid.
6. How sulphuric acid is manufactured by contact
process on industrial scale.
LONG Q.NO.7
1. What is cracking of petroleum? Explain any two ways
in which cracking is carried out?
2. What is orbital hybridization? Explain
SP-hybridization of carbon.
3. What is orbital hybridization explain
sp3-hybridization with the formation of CH2=CH2.
4. What is Isomerism? Discuss position Isomerism and
geometrical Isomerism.
5. Write laboratory and industrial preparation of
acetaldehyde.
6. Write a note on Cannizzaro’s reactions.
7. Describe the mechanism of aldol condensation.
8. Write a brief note on haloform reaction.
9. Describe mechanism for i) Cannizato’s reaction ii)
Aldehyde with NH2 – OH.
10. How acid and base catalyse the nucleophilic
addition reactions of carbon compounds? Give general mechanism of each reaction.
LONG Q.NO.8
1. What do you mean by saturated and unsaturated
hydrocarbons? How there are distinguished chemically? How these are distinguished chemically?
2. Describe with examples the acidic nature of
alkynes.
3. Define polymerization, explain polymerization
reaction of acetylene.
4. Give comparison of Reactivates of Alkenes, Alkenes
and Alkynes.
5. Write four methods for the preparation of Alkenes.
6. Prepare Ethane from Kolbe's Electrolytic method,
Write down its mechanism.
7. Explain with equation how alkenes can be prepared
from Acid and Grignard's reagents.
8. Write uses of Methane.
9. How the presence of double bond is detected by
using Baeyre's reagent?
10.Define alkyl halide. Give three methods to prepare
them from alcohols.
11. Compare E2 and E1 mechanism for Elimination
reactions?
12. Differentiate between SN1 and SN2 reactions.
LONG Q.NO.9
1. What are Aromatic Hydrocarbons? How are they
classified?
2. Define alicyclic compounds and aromatic compounds
with one example in each case.
3. What is resonance? Explain the structure of benzene
on the basis of resonance.
4. Explain Stability of benzene.
5. Discuss two Industrial and two laboratory methods
to prepare Benzene.
6. What are Friedel-Crafts Reactions? Explain
mechanism of alkylation and Acylation of Benzene.
7. Write chemical reactions for preparation of ethanol
from Molasses and Starch.
8. Describe industrial preparation of ethanol. How
will you distinguish between ethanol?
9. How is Methyl alcohol obtained on large scale from
water gas? Draw diagram also.
10. What is Lucas test? How will you distinguish
between primary, secondary and tertiary alcohols by this test?
11. Write two methods for preparation of phenol, how
phenol reacts with Conc. HNO3 and Bromine water
12. Describe acidic behavior of phenol. How does
phenol react with alkali to give salt?
13. Write down Dow’s method for preparing phenol. What
is action of following on phenol:
i) Bromine water ii) HNO3 at different temperatures
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