Haloalkanes and Haloarenes  MCQs

MCQs of Haloalkanes and Haloarenes

Showing 81 to 90 out of 112 Questions
6 7 8 9 10 11
81.
Where Freon-12 is used ?
(a) In refrigerator and airconditioner
(b) As antiseptic in medicine
(c) For extinguishing fire
(d) As cooking gas
Answer:

Option (a)

82.
Which two reagents are required to produce D.D.T. ?
(a) Chloral and chloroform
(b) Chloral and chlorobenzene
(c) Chloroform and chlorobenzene
(d) Chloroform and CCl4
Answer:

Option (b)

83.
Which of the following compounds causes red rashes, if it comes in direct contact with skin ?
(a) CCl4
(b) CHCl3
(c) CH3Cl
(d) CH2Cl2
Answer:

Option (d)

84.
The boiling point of the following haloalkanes follow the order _____ .
(a) C2H5Cl > C2H5Br > C2H5I
(b) C2H5I > C2H5Cl > C2H5Br
(c) C2H5I > C2H5Br > C2H5Cl
(d) C2H5Br > C2H5I > C2H5Cl
Answer:

Option (c)

85.
Which of the following statements is correct ?
(a) Most of the molecules obtained from plants or animals are unsymmetrical.
(b) In Fisher projection the groups in normal position are to be seen on the front side of the plane of paper.
(c) Geometrical isomerism is seen only in compounds having double bonds.
(d) All the tetrahedral carbons are chiral carbons.
Answer:

Option (a)

86.
Which of the following compounds does not show optical activity ?

(a) p.Br-C6H4-CH2-CH2-CH3

(b) C6H5-CHCH3-CH2Br

(c) C6H5C.(CH3)2Br

(d) C6H5-CH2-CHBr-CH3

(a) (a) and (d)
(b) (a) and (c)
(c) (b) and (d)
(d) (c) and (d)
Answer:

Option (b)

87.
The order of ease of SN1 reactions in alkyl halides is _____ .
(a) 3º-halide >2º-halide > 1º-halide > CH3X
(b) CH3X > 1º-halide > 2º-halide > 3º-halide
(c) 3º-halide < 2º-halide < CH3X < 1º-halide
(d) 3º-halide >2º-halide = 1º-halide > CH3X
Answer:

Option (a)

88.
For which of the following only two isomeric monochloro derivatives are possible ?
(a) n-butane
(b) 2, 4-dimethyl pentane
(c) Benzene
(d) 2-methyl propane
Answer:

Option (a)

89.
Choose the correct option about the following sentences. (T = True and F = False)

(i) In SN1 reaction, always racemic mixture is formed and for SN2 reaction, in 50% cases, racemic mixture is formed.

(ii) SN1 reaction occurs through carbonium io mechanism, while SN2 reaction occurs through free radical mechanism.

(a) T, F
(b) F, F
(c) F, T
(d) T, T
Answer:

Option (b)

90.
How many chiral carbon atoms are there in 1-chloro-2, 5-dimethyl cyclohexane ?
(a) 3
(b) 1
(c) 2
(d) 0
Answer:

Option (a)

Showing 81 to 90 out of 112 Questions
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