Haloalkanes And Haloarenes Test

Result

Haloalkanes And Haloarenes Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

Alkyl bromides are prepared by the following reaction:

C₂H₅OH + KBr + HBr → C₂H₅Br + KHSO₄+ H₂O

The mixture of KBr and H₂SO₄is not used for secondary and tertiary alcohols because

A
secondary and tertiary alcohols do not undergo nucleophilic substitution readily

B
the reaction becomes non-spontaneous

C
the carbocation formation cannot take place

D
2^o and 3^o alcohols will undergo dehydration to form alkenes

Solution

In the presence of a base, the 2^o and 3^o alcohols will undergo elimination.
Question 2
1 / -0

The alkyl halide which is not a chain isomer of 1-chloro butane is

A
isobutyl chloride

B
2-chloro-2-methyl propane

C
2-chloro butane

D
tertiary butyl chloride

Solution

2-chloro butane is the position isomer of 1-chloro butane.
All the others are chain isomers.
Question 3
1 / -0

Haloalkanes are those alkyl halides in which the halogen atom is attached to an sp³ hybridised C-atom. Out of the following, which alkyl halides are categorised as haloalkanes?

(A) 2-bromopentane
(B) Chloroethene
(C) Ethanoyl chloride
(D) Trichloromethane

A
Only (A) and (D)

B
Only (B) and (D)

C
Only (A) and (C)

D
Only (B) and (C)

Solution

In both 2-bromopentane and trichloromethane, the carbon atom, to which the halogen is attached, is sp³ hybridised.
Question 4
1 / -0

Which of the following statements is not correct?

A
Iodoalkanes are heavier than water.

B
Bromoalkanes are lighter than water.

C
C-I bond is almost non-polar.

D
Bromo and iodoalkanes develop colour when exposed to light.

Solution

Bromides and iodides have a greater density than that of water due to their greater mass.