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JEE Exam  >  JEE Tests  >  Daily Test for JEE Preparation  >  Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - JEE MCQ

Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - JEE MCQ


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10 Questions MCQ Test Daily Test for JEE Preparation - Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov)

Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) for JEE 2024 is part of Daily Test for JEE Preparation preparation. The Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) questions and answers have been prepared according to the JEE exam syllabus.The Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) below.
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*Multiple options can be correct
Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 1
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When (S)-2-bromopentane is brominated, several 2,3-dibromopentane are formed, which of the following is not formed?

Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 1

During bromination of (S)-2-bromopentane, the configuration at second carbon is not affected. It remains R configuration. The configuration at the third carbon atom can be either S or R.

In options B and C, the configuration at the second carbon atom is R. Hence, they cannot be formed.

Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 2
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The yield of alkyl bromide obtained as a result of heating the dry silver salt of carboxylic acid with bromine in CCI4 is

Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 2

The reaction follows free radical mechanism and alkyl free radical is formed in the propagation step as



Hence, stability of alkyl free radical (3° > 2° > 1°) determine the reactivity.

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Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 3
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Which is incorrect about Hunsdiecker's reaction?

Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 3

Except F2, almost all halogens react with RCOOAg giving alkyl halide via Hunsdiecker reaction.

With l2 if RCOOAg is in excess, R— I formed in the first step reacts further with unreacted salt to give ester as
R—COOAg + R—I → R—COOR + AgI

Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 4
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The major product of the following reaction is 
Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 4

Free radical bromination occur. Preferably at highest degree carbon where most stable free radical is formed.

Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 5
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Racemic mixture is obtained due to the halogenation of
Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 5

If free radical halogenation generate a chiral carbon, racemic mixture of halides are always formed due to equal probability of halogenation from both sides of planar free radical.


Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 6
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The reaction of SOCI2 on alkanols to form alkyl chlorides gives good yields because
Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 6


The gaseous byproducts escape out on its own continuously driving the reaction in forward direction.

Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 7
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Addition of bromine on propene in the presence of brine yields a mixture of
Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 7



Nucleophilic attack in step-ll occur at the carbon atom which can better accommodate the positive charge. Hence, attack of Br- or Cl- in second step occur at 2° carbon rather that at 1° carbon.

Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 8
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One or More than One Options Correct Type

Direction (Q. Nos. 8-12) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q. Which of the following reagents can bring about free radical chlorination of propane?
Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 8

Both SO2CI2 and Cl2 undergo homolytic bond fission when heated or irradiated with light.

*Multiple options can be correct
Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 9
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What is the order of SN2 reaction of the alkyl halide?
Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 9

Answer: (b) The order of SN2 reaction of the alkyl halide is RI > RBr > RCl > RF.

Explanation: Iodine is a good nucleophile and a good leaving group. Thus, it eliminates easily from an alkyl halide favouring SN2 elimination reaction

*Multiple options can be correct
Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 10
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Consider the following reaction,

Q. 

The expected product(s) is/are
Detailed Solution for Test: Methods of Preparation of Haloalkanes and Haloarenes(16 Nov) - Question 10

NBS in CCI4 brings about allylic brom ination by free radical mechanism:





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