Introduction to Organic Chemistry
1. The first organic compound prepared in
the lab is:
| (a) |
Methane
|
(b)
|
Acetic
acid
|
| (c) |
Urea
|
(d)
|
Glucose
|
2. Organic chemistry deals:
| (a) |
All hydrocarbons
|
(b)
|
All
carbon compounds
|
| (c) |
Hydrocarbons & their derivatives
|
(d)
|
All of the above
|
3. Which of the following element is not
present in organic compounds?
| (a) |
S
|
(b)
|
N
|
| (c) |
O
|
(d)
|
Si
|
4. Urea was prepared by Wohler by boiling
…………. with water:
| (a) |
Ammonium chloride
|
(b)
|
Ammonium sulphate
|
| (c) |
Ammonium cyanate
|
(d)
|
Ammonium cyanide
|
5. Which of the following is the important
natural sources of organic compounds?
| (a) |
Plants and Coals
|
(b)
|
Petroleum
|
| (c) |
Natural gas
|
(d)
|
All of the above
|
6. Which of the following is the decaying
product of plants?
| (a) |
Coals
|
(b)
|
Petroleum
|
| (c) |
Natural gas
|
(d)
|
All of the above
|
7. Which of the following is the main
component of coal is?
| (a) |
Pb
|
(b)
|
P
|
| (c) |
C
|
(d)
|
Na
|
8. Which one of the following is not a
component of coal?
| (a) |
N
|
(b)
|
O or S
|
| (c) |
H
|
(d)
|
Si
|
9. Which of the following is a type of
coal?
| (a) |
Anthracite
|
(b)
|
Bituminous coal
|
| (c) |
Lignite (peat)
|
(d)
|
All of them
|
10. The first stage in the conversion of
vegetable matter into coal is:
| (a) |
Peat
|
(b)
|
Anthracite
coal (98%C)
|
| (c) |
Bituminous coal (83%C)
|
(d)
|
Lignite
|
11. Which one of the following forms of coal, contains 80% C
and is used at power generating stations?
| (a) |
Anthracite
|
(b)
|
Sub-bituminous coal
|
| (c) |
Bituminous coal
|
(d)
|
Lignite
|
12. The most
abundant form of coal and is used as energy source and carbonization for coke,
coal tar and coke-oven gas is called:
| (a) |
Anthracite
|
(b)
|
Sub-bituminous coal
|
| (c) |
Bituminous coal
|
(d)
|
Lignite
|
13. The
hardest and the driest form of coal containing 92-98% C and burns without smoke
is called:
| (a) |
Anthracite
|
(b)
|
Sub-bituminous coal
|
| (c) |
Bituminous coal
|
(d)
|
Lignite
|
14. The thermal
decomposition of coal (bituminous) in the absence of air at 500-1000°C gives
coke, coke-oven gas (coal gas) and coal tar.
This process is called:
| (a) |
Carbonization
|
(b)
|
Fractional
distillation
|
| (c) |
Destructive distillation
|
(d)
|
Both (a) and (c)
|
15.Which one of the following is the product
of carbonization/destructive distillation of coal?
| (a) |
Coal tar
|
(b)
|
Coke
(100% Purest C)
|
| (c) |
Coke-oven gas/coal gas
|
(d)
|
All
of the above
|
16. Which one is 100% pure carbon?
| (a) |
Coke
|
(b)
|
Coal gas
|
| (c) |
Gas carbon
|
(d)
|
Coal tar
|
17. Coke-oven gas or coal gas contains:
| (a) |
H2 (50%)
|
(b)
|
CH4
(35%)
|
| (c) |
CO (8%)
|
(d)
|
All of the above
|
18. Coal
tar is considered as “a hidden treasure” because it consists of …… aromatic
organic compounds:
| (a) |
215
|
(b)
|
315
|
| (c) |
415
|
(d)
|
515
|
19. Coal tar gives 215 aromatic compounds on:
| (a) |
Carbonization
|
(b)
|
Fractional
distillation
|
| (c) |
Destructive distillation
|
(d)
|
Aromatization
|
20. The thick black residue left after
fractional distillation of coal tar is called:
| (a) |
Matte
|
(b)
|
Gangue
|
| (c) |
Pitch
|
(d)
|
Mother liquor
|
21. The unrefined petroleum is called:
| (a) |
Crude oil
|
(b)
|
Rock oil
|
| (c) |
Coal gas
|
(d)
|
Both (a) and (b)
|
22. The
separation of different components of a mixture on the basis of their
difference in the boiling points by heating
is called:
| (a) |
Carbonization
|
(b)
|
Fractional
distillation
|
| (c) |
Destructive distillation
|
(d)
|
Aromatization
|
23. The predominant component of petroleum
is:
| (a) |
Alkenes
|
(b)
|
Alkynes
|
| (c) |
Alkanes
|
(d)
|
Benzene
|
24. Petroleum contains alkanes upto:
| (a) |
C 20
|
(b)
|
C 30
|
| (c) |
C 35
|
(d)
|
C 40
|
25. Which one is fraction of petroleum?
| (a) |
Refinery gas
|
(b)
|
Gasoline / Petrol
|
| (c) |
Kerosene oil / Paraffin oil
|
(d)
|
All of the above
|
26. Which one is not the fraction of
petroleum?
| (a) |
Lubricating oil
|
(b)
|
Paraffin wax
|
| (c) |
Coal oven gas
|
(d)
|
Pitch or Bitumin
|
27. The
fraction of petroleum obtained below 20°C, comprising of a mixture of methane,
ethane, propane and
butane is called:
| (a) |
Petrochemicals
|
(b)
|
Petroleum gas
|
| (c) |
Natural gas
|
(d)
|
All of the above
|
28. The
fraction of petroleum obtained in the temperature range of 40°C–180°C
comprising of a mixture of hydrocarbons
having 5–8 carbon atoms is called:
| (a) |
Refinery gas
|
(b)
|
Gas oil
|
| (c) |
Gasoline
|
(d)
|
Pitch
|
29. It is a
mixture of long chain hydrocarbons having 11–12 carbon atoms obtained in the
temperature range of
160–250°C is called:
| (a) |
Refinery gas
|
(b)
|
Kerosene oil
|
| (c) |
Gasoline
|
(d)
|
Pitch
|
30. Natural gas mainly consists of:
| (a) |
Ethane
|
(b)
|
Methane
|
| (c) |
Butane
|
(d)
|
Propane
|
31. In Pakistan ,
there are vast reserves of natural gas at …………… in Baluchistan :
| (a) |
Khewra
|
(b)
|
|
| (c) |
Sui
|
(d)
|
Dandot
|
32. The natural gas containing hydrocarbons
of low molecular weight is called:
(a)
|
Dry gas
|
(b)
|
Wet gas
|
(c)
|
Gas carbon
|
(d)
|
Refinery gas
|
33. The natural gas containing hydrocarbons
of high molecular weight is called
(a)
|
Dry gas
|
(b)
|
Wet gas
|
(c)
|
Gas carbon
|
(d)
|
Refinery gas
|
34. The fractional distillation of petroleum
yield about _______% petrol.
(a)
|
50%
|
(b)
|
30%
|
(c)
|
40%
|
(d)
|
20%
|
35. Catalysts such as aluminosilicates (Al2O3/SiO2)
accelerate the process of cracking. These catalysts are called:
(a)
|
Cracking catalyst
|
(b)
|
Reforming catalyst
|
(c)
|
Polymerization catalyst
|
(d)
|
Carbonization catalyst
|
36. The process of a cracking takes place
between temperatures:
(a)
|
1000–200°C
|
(b)
|
500–700°C
|
(c)
|
500–600°C
|
(d)
|
500–800°C
|
37. Cracking of propane gives:
(a)
|
Propene
|
(b)
|
Ethene
|
(c)
|
Methane
|
(d)
|
All of the above
|
38. A large
number of organic compounds especially the unsaturated ones, show a great
tendency to unite. This process of
chemical combination of molecules is termed as:
(a)
|
Pyrolysis
|
(b)
|
Knocking
|
(c)
|
Polymerization
|
(d)
|
Cracking
|
39. Which one of the following is an addition
polymer?
(a)
|
PVA
|
(b)
|
PVC
|
(c)
|
Polytetrafluro ethylene (PTFE)
|
(d)
|
All of the above
|
40. PVC is a polymer of:
(a)
|
Vinyl chloride
|
(b)
|
Vinyl acetate
|
(c)
|
Ethylene
|
(d)
|
TFE
|
41. PVA is a polymer of:
(a)
|
Vinyl chloride
|
(b)
|
Vinyl acetate
|
(c)
|
Ethylene
|
(d)
|
TFE
|
42. The
condensation polymer of hexan-1,6-dioic acid (adipic acid) and
1,6–diaminohexane is called:
(a)
|
Nylon
|
(b)
|
Terylene
|
(c)
|
Bakelite
|
(d)
|
PVC
|
43. Nylon 6.6 is a:
(a)
|
Polyester
|
(b)
|
Polythene
|
(c)
|
Polyamide
|
(d)
|
None
of the above
|
44. The polymer of formaldehyde and phenol is
called:
(a)
|
Nylon
|
(b)
|
Terylene
|
(c)
|
Bakelite
|
(d)
|
PVC
|
45. The polymer of Benz-1,4–dioic acid
(terephthalic acid) and ethylene glycol is called:
(a)
|
Nylon
|
(b)
|
Terylene
|
(c)
|
Bakelite
|
(d)
|
PVC
|
46. Terylene is a:
(a)
|
Polyester
|
(b)
|
Polythene
|
(c)
|
Polyamide
|
(d)
|
Polyethene
|
47. Compounds having same molecular formula
but different structural formulae are said to be:
(a)
|
Polymers
|
(b)
|
Isomers
|
(c)
|
Monomers
|
(d)
|
Dimers
|
48. Which one of the following is a type of
isomerism:
(a)
|
Chain or skeletal
|
(b)
|
Stereo
isomerism
|
(c)
|
Metamarism
|
(d)
|
All
of the above
|
49. Two or
more than two compounds of the same molecular formula having different carbon
skeletons or
chains are said to be:
(a)
|
Chain isomers
|
(b)
|
Position
isomers
|
(c)
|
Functional group isomers
|
(d)
|
Metamers
|
50. Two or
more compounds of the same molecular formula having different structural
formulas due to different position of the
same functional group or multiple bonds (in case of unsaturated compounds) are
termed as:
| (a) |
Chain isomers
|
(b)
|
Position
isomers
|
| (c) |
Functional group isomers
|
(d)
|
Metamers
|
51. Two or
more compounds of same molecular formula having different functional groups are
called:
| (a) |
Chain isomers
|
(b)
|
Position
isomers
|
| (c) |
Functional group isomers
|
(d)
|
Metamers
|
53. Butene with molecular formula C4H8
has ________ isomers.
| (a) |
2
|
(b)
|
3
|
| (c) |
4
|
(d)
|
No
|
53. Two or more
compounds of same molecular formula having different alkyl radicals attached to
the same
polyvalent atom are termed as:
| (a) |
Chain isomers
|
(b)
|
Position
isomers
|
| (c) |
Functional group isomers
|
(d)
|
Metamers
|
54. Decane has ________ isomers:
| (a) |
3
|
(b)
|
9
|
| (c) |
25
|
(d)
|
75
|
55. Cracking of methane gives:
| (a) |
Carbon black and water
|
(b)
|
Carbon black and hydrogen gas
|
| (c) |
Carbon dioxide and hydrogen gas
|
(d)
|
Carbon dioxide and water
|
56. Cracking of ethane gives:
| (a) |
Ethylene and water
|
(b)
|
Ethylene and hydrogen gas
|
| (c) |
Ethylene and methane
|
(d)
|
None of the above
|
57. Cracking of n-butane gives:
(a)
|
1-butene and 2-butene
|
(b)
|
Propene
|
(c)
|
Ethene and ethane and Methane and H2 gas
|
(d)
|
All of the above
|
58. Which
one of the following processes involves addition of unsaturated monomers of
same compounds?
| (a) |
Knocking
|
(b)
|
Addition polymerization
|
| (c) |
Condensation polymerization
|
(d)
|
Cracking
|
59. Which one of the following processes
involves addition of two different types of monomers?
| (a) |
Knocking
|
(b)
|
Addition polymerization
|
| (c) |
Condensation polymerization
|
(d)
|
Cracking
|
60. Which of the following is correct
regarding cracking?
| (a) |
It
involves breaking of a larger molecule into smaller molecules by the action
of heat and in the absence of air.
|
(b)
|
It involves splitting
the larger alkanes molecules of less volatile fractions into smaller alkanes
and alkenes molecules of high volatile fractions by subjecting them to high
temperature and pressure in the presence of catalyst.
|
| (c) |
It is carried out
in absence of air to avoid combustion.
|
(d)
|
All of the above.
|
Chemistry of Hydrocarbons
1. The
hydrocarbons in which each carbon atom is sp3 hybridized are called:
(a)
|
Alkenes
|
(b)
|
Alkanes
|
(c)
|
Alkyne
|
(d)
|
Benzene
|
2. Alkanes
are also called:
(a)
|
Olefins
|
(b)
|
Acetylenes
|
(c)
|
Paraffins
|
(d)
|
Alkylenes
|
3. The
hydrocarbons in which at least two carbon atoms are sp2-hybridized
are called:
(a)
|
Alkanes
|
(b)
|
Benzene
|
(c)
|
Alkenes
|
(d)
|
Alkynes
|
4. Alkenes
are also called:
(a)
|
Acetylenes
|
(b)
|
Olefins
|
(c)
|
Benzene
|
(d)
|
Paraffins
|
5. The
hydrocarbons in which at least two carbon atoms are sp-hybridized are called:
(a)
|
Alkanes
|
(b)
|
Benzene
|
(c)
|
Alkenes
|
(d)
|
Alkynes
|
6. Alkanes
are characterized by the presence of ……….. bond between two carbon atoms:
(a)
|
Triple
|
(b)
|
Single
|
(c)
|
Double
|
(d)
|
Pi(p)
|
7. Alkenes
are characterized by the presence of ______ bond between two carbon atoms:
(a)
|
Triple
|
(b)
|
Single
|
(c)
|
Double
|
(d)
|
All of the above
|
8. Alkynes
are characterized by the presence of ______ bond between two carbon atoms:
(a)
|
Triple
|
(b)
|
Single
|
(c)
|
Double
|
(d)
|
All of the above
|
9. Methane
is also known as:
(a)
|
Oil gas
|
(b)
|
Gas carbon
|
(c)
|
Marsh gas
|
(d)
|
Gasoline
|
10. Methane
gas is soluble in:
(a)
|
Water
|
(b)
|
Nitric acid
|
(c)
|
Sulphuric acid
|
(d)
|
Ethanol
|
11. Which
one of the following undergoes substitution reactions?
(a)
|
Alkynes
|
(b)
|
Alkanes
|
(c)
|
Alkenes
|
(d)
|
All of the above
|
12. Which
one of the following undergoes addition reactions?
(a)
|
Alkenes
|
(b)
|
Alkynes
|
(c)
|
Alkanes
|
(d)
|
Both (a) and (b)
|
13. Which
one is obtained by heating a mixture of sodium ethanoate and soda lime?
(a)
|
Ethane
|
(b)
|
Propane
|
(c)
|
Benzene
|
(d)
|
Methane
|
14. Hydrolysis
of aluminium carbide with water gives:
(a)
|
Ethane
|
(b)
|
Propane
|
(c)
|
Benzene
|
(d)
|
Methane
|
15. Which
one is obtained by heating sodium propionate with soda lime?
(a)
|
Ethane
|
(b)
|
Propane
|
(c)
|
Benzene
|
(d)
|
Methane
|
16. Ethane
has total ……….. sigma bonds?
(a)
|
3
|
(b)
|
4
|
(c)
|
5
|
(d)
|
7
|
17. Natural
gas contains …………% ethene.
(a) (a)
|
5
|
(b)
|
2–2.5
|
(c)
|
3
|
(d)
|
1–1.5
|
18. Catalytic hydrogenation of alkenes/alkynes
occur at room temperature, when …… is used as catalyst:
(a)
|
Pt / Pd
|
(b)
|
Pt / Ni
|
(c)
|
Pd / Ni
|
(d)
|
Ni
|
19. Halogenation
of alkane is an example of:
(a)
|
Chain reaction
|
(b)
|
Substitution reaction
|
(c)
|
Photochemical reaction
|
(d)
|
All of the above
|
20. In
the presence of sun-light, methane (alkanes) undergoes photochemical
substitution reaction with chlorine
or bromine called:
(a)
|
Hydrogenation
|
(b)
|
Hydrohalogenation
|
(c)
|
Halogenation
|
(d)
|
Nitration
|
21. Which
one is prepared by heating ethanol with conc. H2SO4 at
180°C.
(a)
|
Ethylene
|
(b)
|
Propene
|
(c)
|
Ethane
|
(d)
|
Ethyne
|
22. The
elimination of HX from adjacent carbon atoms of a molecule is called:
(a)
|
Dehydrogenation
|
(b)
|
Dehalogenation
|
(c)
|
Dehydrohalogenation
|
(d)
|
Pyrolysis
|
23. The
dehydrohalogenation of alkyl halide gives alkene when reacts with:
(a)
|
Alcoholic a-naphthol
|
(b)
|
Aqueous caustic potash
|
(c)
|
Alcoholic caustic potash
|
(d)
|
Aqueous soda lime
|
24. Which
one of the following acts as anaesthetic?
(a)
|
Ethene
|
(b)
|
Ethane
|
(c)
|
Ethyne
|
(d)
|
Benzene
|
25. The
density of ethene is ………….:
(a)
|
Less than air
|
(b)
|
Equal to that of
air
|
(c)
|
Much greater than air
|
(d)
|
More than air
|
26. Dihalogen derivatives of alkanes having
two same halogen atoms on adjacent carbon atoms are called:
(a)
|
Vicinal dihalide
|
(b)
|
Gem dihalide
|
(c)
|
Halogen derivative
|
(d)
|
Alkyl halide
|
27. Vicinal
dihalide on _______ forms alkenes:
(a)
|
Dehalogenation
|
(b)
|
Dehydrogenation
|
(c)
|
Dehydrohalogenation
|
(d)
|
Halogenation
|
28. Which process is important in the
hardening of vegetable and animal oils to produce solid fats which are used to make margarine?
(a)
|
Catenation
|
(b)
|
Halogenation
|
(c)
|
Hydrogenation
|
(d)
|
Pyrolysis
|
29. Vicinal
dihalide forms alkene when reacts with:
(a)
|
(b)
|
Sulphuric acid
|
|
(c)
|
Alcoholic potash
|
(d)
|
Zinc dust
|
30. Alkenes
readily add one molecule of halogens forming:
(a)
|
Vicinal dihalide
|
(b)
|
Gem dihalide
|
(c)
|
Epoxide
|
(d)
|
Alkyl halide
|
31. Ethene
combines with chlorine to form an oily liquid (C2H4Cl2)
called:
(a)
|
Dutch-liquid
|
(b)
|
Mustard gas
|
(c)
|
Polythene
|
(d)
|
Expoxide
|
32. Hydrohalogenation
of alkene produces:
(a)
|
Alkane
|
(b)
|
Alcohol
|
(c)
|
Alkyl halide
|
(d)
|
Expoxide
|
33. Catalytic
hydration of ethene in presence of 10% H2SO4 and using
mercuric sulphate as catalyst produces:
(a)
|
Ethyne
|
(b)
|
Ethane
|
(c)
|
Methanol
|
(d)
|
Ethyl alcohol
|
34. Addition
of hypochlorous acid in ethene gives:
(a)
|
Ethyl alcohol
|
(b)
|
Epoxide
|
(c)
|
Ethylene
chlorohydrin
|
(d)
|
Dutch liquid
|
35. Ethene gives an addition product with
oxygen when a mixture of ethene and air is passed over heated silver (catalyst) under pressure, which is called:
(a)
|
Superoxide
|
(b)
|
Ozonide
|
(c)
|
Ethoxide
|
(d)
|
Epoxide
|
36. The
molecular formula of ethylene epoxide is:
(a)
|
C2H4O
|
(b)
|
C2H4O2
|
(c)
|
C2H5O
|
(d)
|
C2H3O
|
37. C2H4O3
is the molecular formula of:
(a)
|
Epoxide
|
(b)
|
Ozonide
|
(c)
|
Superoxide
|
(d)
|
Ethoxide
|
38. Ethene
gives an addition product when ozone is passed through a solution of ethene in
an inert solvent (ether), which is called:
(a)
|
Epoxide
|
(b)
|
Superoxide
|
(c)
|
Ozonide
|
(d)
|
Ethoxide
|
41. Ethylene
ozonide on reaction with zinc dust in presence of boiling water gives:
(a)
|
Epoxide
|
(b)
|
Ethoxide
|
(c)
|
Ethane
|
(d)
|
Formaldehyde
|
42. Baeyer’s
test is used for the detection of a _______ bond in an organic molecule:
(a)
|
Single
|
(b)
|
Double
|
(c)
|
Triple
|
(d)
|
All of the above
|
43. Which
was used in the First World War as a blistering agent?
(a)
|
Coal gas
|
(b)
|
Mustard gas
|
(c)
|
b,b-dichloro ethyl
sulphide
|
(d)
|
Both b and c
|
44. b, b-dichloro diethyl
sulphide is the chemical name for:
(a)
|
Coal gas
|
(b)
|
Mustard gas
|
(c)
|
Oil gas
|
(d)
|
Phosgene
|
45. Ethene
forms mustard gas on treatment with:
(a)
|
Sulphuryl chloride
|
(b)
|
Carbonyl chloride
|
(c)
|
(d)
|
None of the above
|
46. Which of the following gives polyethylene
when heated to 100–200°C at 100 atm. pressure in traces of oxygen?
(a)
|
Ethyne
|
(b)
|
Ethane
|
(c)
|
Ethene
|
(d)
|
Benzene
|
47. Which
of the following is not used as a catalyst for the improvement in the
properties of polyethylene?
(a)
|
Ni
|
(b)
|
Titantium tetrachloride
|
(c)
|
Aluminium triethyl
Al(C2H5)3
|
(d)
|
All
of the above
|
48. Hydroxylation
of ethene with aqueous KMnO4 gives:
(a)
|
Glycol
|
(b)
|
Glycerine
|
(c)
|
Epoxide
|
(d)
|
Dutch liquid
|
49. Which
of the following discovered acetylene accidentally in 1899?
(a)
|
(b)
|
Kolbe
|
|
(c)
|
Wurtz
|
(d)
|
Berzellus
|
50. Which
of the following is obtained when calcium carbide reacts with water?
(a)
|
Ethylene
|
(b)
|
Ethane
|
(c)
|
Acetylene
|
(d)
|
Benzene
|
51. Acetylene
has a characteristic ethereal smell resembling to that of ________.
(a)
|
Rotten egg
|
(b)
|
Bleaching powder
|
(c)
|
Chlorine
|
(d)
|
Garlic
|
52. Dehydrohalogenation
of vicinal dihalide with alcoholic potash gives:
(a)
|
Methane
|
(b)
|
Ethene
|
(c)
|
Alkyne
|
(d)
|
Benzene
|
53. Dehalogenation
of tetrahalo alkane with zinc duct gives:
(a)
|
Methane
|
(b)
|
Ethene
|
(c)
|
Alkyne
|
(d)
|
Benzene
|
54. Ethyne
adds ------ molecules of halogen acids.
(a)
|
1
|
(b)
|
2
|
(c)
|
3
|
(d)
|
4
|
55. Which
one of the following is formed when ethyne is hydrohalogenated completely?
(a)
|
1,1-dihaloethane
|
(b)
|
1,2-dibromeethane
|
(c)
|
Vicinal dihalide
|
(d)
|
All of the above
|
56. Ethyne adds a molecule of water when it
is heated at 98°C in the presence of a mixture of H2SO4
and HgSO4
as catalyst forming vinyl alcohol which
on rearrangement forms:
(a)
|
Benzene
|
(b)
|
Ethanol
|
(c)
|
Methane
|
(d)
|
Acetaldehyde
|
57. Complete
hydrogenation of ethyne gives:
(a)
|
Ethene
|
(b)
|
Ethanol
|
(c)
|
Ethane
|
(d)
|
Benzene
|
58. Acetylene
at 300°C when passes through a copper tube polymerizes into:
(a)
|
Benzene
|
(b)
|
Vinyl acetate
|
(c)
|
Acetaldehyde
|
(d)
|
Vinyl acetylene
|
59. Ethyne
burns with:
(a)
|
Blue flame
|
(b)
|
Green flame
|
(c)
|
Yellow flame
|
(d)
|
Smoky flame
|
60. Which
one is used for the artificial ripening of fruit?
(a)
|
Acetylene
|
(b)
|
Ethene
|
(c)
|
Ethane
|
(d)
|
Methane
|
61. The
addition of un-symmetrical reagents in unsymmetrical alkene or alkyne is
governed by:
(a)
|
Hund’s Rule
|
(b)
|
(n + l) Rule
|
(c)
|
Markownikoff’s Rule
|
(d)
|
Pauli’s Rule
|
62. According to Markownikoff’s rule, the
negative part of adding reagent attaches itself to the carbon atom of
unsymmetrical alkene (alkyne) which have
------ number of hydrogen atoms
(a)
|
Higher
|
(b)
|
Lesser
|
(c)
|
Equal
|
(d)
|
None of them
|
63. On
large scale, ethane is obtained by:
(a)
|
Sabatier-Senderens
Reaction (Hydrogenation of alkenes/alkynes)
|
(b)
|
Catalytic reduction
of ethyl iodide
|
(c)
|
Wurtz reaction
|
(d)
|
All of the above
|
64. Which
one of the following reaction is used as a test for unsaturation in ethene?
(a)
|
Action of H2
gas on ethene
|
(b)
|
Action of HI on
ethene
|
(c)
|
Action of bromine
solution on ethene
|
(d)
|
All of the above
|
65. Which
one of the following is not correct regarding the identification test of ethene?
(a)
|
It decolourizes
bromine water
|
(b)
|
It discharges the
purple colour of potassium permanganate
|
(c)
|
It gives an oily
liquid with chlorine (dutch-liquid)
|
(d)
|
All of the above
|
66. Which
one of the following reactions is not used as a test for the identification of acetylene?
(a)
|
Action of aqueous
ammonical AgNO3 on acetylene.
|
(b)
|
Action of aqueous
ammonical CuCl on acetylene
|
(c)
|
Action of aqueous
HCl on acetylene.
|
(d)
|
All of the above
|
Benzene and Phenols (Arenes)
1. Who discovered benzene?
(a)
|
Michael Faraday
|
(b)
|
Hofmann
|
(c)
|
Solvay
|
(d)
|
Ostwald
|
2. Who found benzene in coal-tar?
(a)
|
Michael Faraday
|
(b)
|
Hofmann
|
(c)
|
Solvay
|
(d)
|
Kolbe
|
3. Which one of the following gives benzene when
reacts with soda lime?
(a)
|
Sodium acetate
|
(b)
|
Sodium propionate
|
(c)
|
Sodium benzoate
|
(d)
|
All of the above
|
4. Reduction of phenol with zinc dust on heating
gives:
(a)
|
Toluene
|
(b)
|
Benzene
|
(c)
|
Xylene
|
(d)
|
Cyclohexane
|
5. Reduction (hydrogenation) of benzene in the
presence of Ni at 200°C gives:
(a)
|
Toulene
|
(b)
|
Benzoic acid
|
(c)
|
Xylene
|
(d)
|
Cyclohexane
|
6. Which of the following reactions would
benzene is expected to undergo?
(a)
|
Addition
|
(b)
|
Elimination
|
(c)
|
Substitution
|
(d)
|
Cracking
|
7. Aromatization or hydroforming of n-heptane
obtained from petroleum gives:
(a)
|
Toluene
|
(b)
|
Xylene
|
(c)
|
Cyclohexane
|
(d)
|
Benzene
|
8. Benzene preferably undergo……………. reaction:
(a)
|
Addition
|
(b)
|
Electrophilic substitution
|
(c)
|
Nucleophilic substitution
|
(d)
|
Oxidation
|
9. –SO2OH group is called:
(a)
|
Carbonyl group
|
(b)
|
Sulphuryl group
|
(c)
|
Sulphonic group
|
(d)
|
Phenyl group
|
10. Xylene has ________ isomers.
(a)
|
2
|
(b)
|
1
|
(c)
|
3
|
(d)
|
4
|
11. Sulphonation of benzene with fuming sulphuric
acid at 80°C gives:
(a)
|
Toluene sulphonic acid
|
(b)
|
Xylene sulphonic
acid
|
(c)
|
Benzene sulphonic acid
|
(d)
|
Methane sulphonic
acid
|
12. Oxidation of Toulene by alkaline KMnO4
or acidified K2Cr2O7 gives:
(a)
|
Benzoic acid
|
(b)
|
Benz.dioic acid
|
(c)
|
Tartaric acid
|
(d)
|
Citric acid
|
13. Halogenation of benzene in strong ultra violet
light gives:
(a)
|
An addition product
|
(b)
|
A substituted
product
|
(c)
|
An oxidised product
|
(d)
|
All of the above
|
14. Under the influence of anhydrous aluminium
chloride as a catalyst, benzene reacts with alkyl and acyl halides giving alkylated and acylated benzenes. The reaction is called:
(a)
|
Friedel-Craft’s Reaction
|
(b)
|
Berthelot‘s
Reaction
|
(c)
|
Sabatier-Senderens Reaction
|
(d)
|
Lane’s Process
|
15. Benzene adds 3 molecules of chlorine gas in
presence of sunlight gives:
(a)
|
Benzene hexachloride
|
(b)
|
Hexachloro
cyclohexane
|
(c)
|
Hexachloro benzene
|
(d)
|
All of the above
|
16. Which one of the following is not the isomer of
xylene?
(a)
|
1,2–dimethyl benzene
|
(b)
|
1,3–dimethyl
benzene
|
(c)
|
1,4–dimethyl benzene
|
(d)
|
All of the above
|
17. The positioning of a new incoming group in the
monosubstituted benzene ring is called:
(a)
|
Orientation
|
(b)
|
Directive influence
of substituents
|
(c)
|
Orienting effect
|
(d)
|
All of the above
|
18. Which of the following groups direct the 2nd
substituent to the meta position:
(a)
|
Nitro group
|
(b)
|
Carboxylic group
|
(c)
|
Carbonyl group
|
(d)
|
Sulphonic acid
group
|
19. Which one of the following groups are o-p
directing substituents:
(a)
|
Alkyl group
|
(b)
|
Alkoxy group
|
(c)
|
Amino group or Hydroxyl group
|
(d)
|
All of the above
|
20. Which of the following is not an o-p directing
substituents?
(a)
|
Amide group (–NHCOR)
|
(b)
|
Sec.amino group (>NH)
|
(c)
|
Ter amino group (–>N)
|
(d)
|
Ester group (–COOR)
|
21. According to Huckel rule, cyclic compounds will
show aromaticity when:
(a)
|
They have (4n – 2) pi electrons
|
(b)
|
They have (4n + 2)
pi electrons.
|
(c)
|
They have (4Ï€ +2) electrons
|
(d)
|
They have (4Ï€ -2)
electrons
|
22. The C-C bond length in benzene is:
(a)
|
1.54°A
|
(b)
|
1.39°A
|
(c)
|
1.20°A
|
(d)
|
1.34°A
|
23. Shape of benzene molecule is:
(a)
|
Linear
|
(b)
|
Pyramidal
|
(c)
|
Planar trigonal
|
(d)
|
Planar hexagonal
|
24. Aromaticity of benzene is due to:
(a)
|
Delocalization of π electrons
|
(b)
|
Presence of sigma
bonds
|
(c)
|
Ring structure
|
(d)
|
Three double bonds
|
25. In which case the C-C bond length is same:
(a)
|
Benzene
|
(b)
|
Propyne
|
(c)
|
1-butene
|
(d)
|
2-butene
|
26. Which type of overlapping forms the C-C bond in
benzene?
(a)
|
sp3-sp3
|
(b)
|
sp2-sp2
|
(c)
|
sp-sp
|
(d)
|
sp3-s
|
27. Which one of the following is polycyclic
compound?
(a)
|
Styrene
|
(b)
|
Cumene
|
(c)
|
Naphthalene
|
(d)
|
Xylene
|
28. Elimination reaction is not given by:
(a)
|
Alcohol
|
(b)
|
Alkyl halides
|
(c)
|
Benzene
|
(d)
|
Alkanes
|
29. Anhydrous AlCl3 is used in the
Friedal-Craft’s reaction because it is:
(a)
|
Soluble in ether
|
(b)
|
Insoluble in
benzene
|
(c)
|
Electron deficient
|
(d)
|
Electron rich
|
30. The catalytic air oxidation of benzene gives:
(a)
|
Benzoic acid
|
(b)
|
Maleic anhydride
|
(c)
|
Maleic acid
|
(d)
|
Benzoic anhydride
|
31. The compound that is nitrated with difficulty
is:
(a)
|
Phenol
|
(b)
|
Benzene
|
(c)
|
Toluene
|
(d)
|
Nitrobenzene
|
32. Which of the following compounds reacts slower
than benzene in electrophilic substitution?
(a)
|
C6H5-NO2
|
(b)
|
C6H5-NH2
|
(c)
|
C6H5-CH3
|
(d)
|
C6H5-OH
|
33. Amongst the following the strongest ortho-para
directing group is:
(a)
|
-Cl
|
(b)
|
-OH
|
(c)
|
-Br
|
(d)
|
- C6H5
|
34. The ratio of sigma and pi bonds in benzene is:
(a)
|
2
|
(b)
|
6
|
(c)
|
8
|
(d)
|
4
|
35. Benzene contains:
(a)
|
4Ï€ electrons
|
(b)
|
3Ï€ electrons
|
(c)
|
8Ï€ electrons
|
(d)
|
6Ï€ electrons
|
36. Six carbon atoms of benzene are of:
(a)
|
Two types
|
(b)
|
Three types
|
(c)
|
Six types
|
(d)
|
One type
|
37. The reaction of toluene with chlorine in
presence of FeCl3 gives mainly:
(a)
|
m-chlorotoluene
|
(b)
|
o- and
p-chlorotoluene
|
(c)
|
Benzoyl chloride
|
(d)
|
Benzyl chloride
|
38. During nitration of benzene the active
nitrating agent is:
| (a) |
HNO3
|
(b)
|
NO2-
|
| (c) |
NO3-
|
(d)
|
NO2+
|
39. Ortho-para directing groups are generally:
| (a) |
Deactivating groups
|
(b)
|
Activating groups
|
| (c) |
Neutral groups
|
(d)
|
None of these
|
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