Chap 7 _2 (2nd year)
36. Which process increases the yield of gasoline from petroleum?
a) Cracking b) Polymerization
c) Reforming d) Sublimation
37. Consider the reaction
3C2H2 C6H6
This is the example of
a) Pyrolysis b) Polymerization
c) Sublimation d) Addition
38. Which one is acyclic hydrocarbon?
a) C6H6 b) C2H6
c) C6H12 d) CH4
39. Which type of isomerism is shown by the following compounds?
CH3 – CH2 – CHO, CH3 – CO – CH3
a) Chain isomerism
b) Position isomerism
c) Metamerism
d) Functional group isomerism
40. The type of isomerism found in 1 – butene and 2 – butane is
a) Position b) Chain
c) Functional group d) Metamerism
41. The members of which of these have similar methods of preparation and properties
a) Isomers b) Homologues
c) Polymers d) Monomers
42. The maximum number of isomers for an alkene with molecular formula C4H8 is
a) 2 b) 3
c) 4 d) 5
43. Which of the following is most stable ion?
a) CH3 – H2C+ b) (CH3)2 HC+
c) (CH3)3 C+ d) All of these
44. Which of the following is not an organic compound?
a) Urea b) Oxalic acid
c) Natural gas d) Plaster of Paris
45. Kerosine oil is a mixture of
a) Alkane b) Alkene
c) Alkynes d) All of these
46. Which of the following compounds does not contain an OH group?
a) Alcohol b) Phenol
c) Aldehyde d) Carboxylic acid
47. The chemical formula of chloride is
a) CH3OH b) CCl3OH
c) CCl3CHO d) None of these
48. Petroleum in the unrefined form is called ____
a) Rock oil b) Coal gas
c) Crude oil d) Both a & c
49. Natural gas mainly consists of ________
a) Methane b) Ethane
c) Propane d) Butane
50. _______ is a mixture of methane, ethane,
propane and butane, used as a fuel and for
making other organic chemicals.
a) Refinery gas b) Gasoline
c) Kerosene oil d) Gas oil
51. A large number of organic compounds,
especially the unsaturated ones, show a great
tendency to unit. This process is termed as
______
a) Pyrolysis b) Cracking
c) Polymerization d) None of these
52. An isomer of ethanol is ________
a) Dimethyl ether b) Diethyl ether
c) Ethylene glycol d) Methanol
53. When ethylene is heated under pressure, a
transparent solid polymer, ________ is
obtained.
a) Polyethene b) Ethane
c) Methane d) None of these
54. The quality of petroleum is determined by
_______
a) Decane number b) Octane number
c) Hexane number d) None of these
55. Two or more than two different compounds
having the same molecular formula but
different carbon chains or skeletons are said
to be ______
a) Chain isomers
b) Position isomers
c) Functional group isomers
d) Metamers
56. The kind of isomerism which depends upon
the relative position of the functional group, or
the position of double or tripe bond in case of
unsaturated compounds is termed as
________
a) Chain isomerism
b) Position isomerism
c) Functional group isomerism
d) Metamerism
57. Isomerism, which involves compounds having
the same molecular formula, but different
functional groups are called _______
a) Chain isomerism
b) Position isomerism
c) Functional group isomerism
d) Metamerism
58. _______ is exhibited by compounds having
the same functional group but different alkyl
attached to the same multivalent atom.
a) Chain isomerism
b) Position isomerism
c) Functional group isomerism
d) Metamerism
59. In cracking usually catalyst used is _______
a) Pt b) Aluuminosilicate
c) Ni d) Tetra ethyl lead
60. In CCl4 molecule the four valencies of carbon
atom are directing towards the corners of a
_______
a) Cube b) Hexagon
c) Prism d) Tetrahedron
61. The general formula (RCO)2O represents
________
a) An ether b) Ketone
c) An ester d) An acid hydride
62. ______ has the longest bond length.
a) C = C b) C ≡ C
c) C – C d) All of these
63. Compounds in which two alkyl groups are
attached to an oxygen atom are called ______
a) Alkanes b) Ethers
c) Alcohols d) Isomer
64. ________ is the common name of methanol.
a) Formaldehyde b) Acetaldehyde
c) Propionaldehyde d) None of these
65. ______ is the common name of propanone.
a) Acetone b) Ketone
c) Diethyl ketone d) None to these
66. The properties of organic compounds are due
to _______
a) Covalent bonds b) Functional groups
c) Ionic bonds d) None of these
67. ______ of the following are isomers.
a) Methyl alcohol and dimethyl ether
b) Ethyl alchohol and dimethyl ether
c) Acetone and Acetaldehyde
d) Proponoic acid and propanone
68. Which compound contains an sp hybridized C
atom?
a) CH3CN b) CH3CHO
c) CH3NH2 d) None
69. Which of the following isomeric substances
would be expected to have the lowest boiling
point?
a) Hexane b) 2 – methlypentane
c) 2, 2 – dimethylbutane d) 3 – methlypentane
70. The isomers must have the same ______
a) Structural formula b) Molecular formula
c) Chemical formula d) Physical properties
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