Haloalkanes and Haloarenes Test

Result

Haloalkanes and Haloarenes Test - 52

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following show optical isomerism?

A

B

C

D

Solution
Question 2
1 / -0

Here decreasing order of the rate of Bromination of the following compounds is:
I. $${ Ph }\overset { \oplus }{ NM } e_{ 3 }$$
II.$$Ph{ CH }_{ 2 }\overset { \oplus }{ N } Me_{ 3 }$$
III $$PhMe$$
IV. $$PhNM{ e }_{ 2 }$$

A
(I)>(II)>(III)>(IV)

B
(IV)>(III)>(II)>(I)

C
(III)>(IV)>(I)>(II)

D
(III)>(IV)>(II)>(I)

Solution
Question 3
1 / -0

Which of the following can undergo nucleophilic substitution reactions?

A
$$CH_3-C\equiv C-H$$

B
$$CH_3-CH_2-CH_3$$

C
$$CH_3-CH=CH_2$$

D
$$CH_3-CH_2-Br$$

Solution

$$C{H_3} - C{H_2} - Br$$
This reaction is applied for alkyl halide.
Bromide ion is a very good leaving group.
Hence option (D) is correct.
Question 4
1 / -0

What is the minimum quantity (in grams) of methyl bromide required for preparing one mole of ethane by wurtz reaction?

A
188

B
109

C
326

D
284
Question 5
1 / -0

In the following reaction,the product 'R' is : $${ CaC }_{ 2 }\overset { { H }_{ 2 }O }{ \longrightarrow } P\overset { hot\quad iron }{ \underset { tube }{ \longrightarrow } } Q\overset { { CH }_{ 3 }Cl }{ \underset { { AlCl }_{ 3 } }{ \longrightarrow } } R$$

A
Chloro benzene

B
benzene

C
toluene

D
anisole

Solution

Solution:- (C) toluene
$$3 Ca{C}_{2} \xrightarrow[-3 Ca{\left( OH \right)}_{2}]{3 {H}_{2}O} 3 {C}_{2}{H}_{2} \xrightarrow{\text{hot iron tube}} {C}_{6}{H}_{6} \xrightarrow[Al{Cl}_{3}]{C{H}_{3}Cl} \underset{\left( \text{Toluene} \right)}{{C}_{6}{H}_{5}-C{H}_{3}}$$

Hence the product $$R$$ is toluene.
Question 6
1 / -0

Which one of the following compound is most reactive towards $$SN^1$$ reaction

A

B

C

D

Solution

The compound which forms most stable carbocation is most reactive towards $$SN^1$$ reaction.
Here, is most reactive towards $$SN^1$$ reaction.
($$\because Br$$ is better leaving group compared to Cl)
Question 7
1 / -0

Which of the following alkyl halides would you expect to undergo $$S_N1$$ reaction most rapidly ?

A

B

C

D
They will not undergo $$S_N1$$ reaction.
Question 8
1 / -0

What is the CORRECT order of reactivity of the following compounds in atomic nucleophilic substitution reaction when treated with aq. NaOH?

A
I > II > II IV

B
IV > III > II > I

C
II > III > I > IV

D
IV > II > I > III

Solution
Question 9
1 / -0

2-choloro-2-methylpentane on reaction with sodium methoxide in methanol yields

A

B

C

D
None of these
Question 10
1 / -0

Which of the following is a correct order of reactivity of chlorides for given compounds ?

A
$$I > II > III > IV > V $$

B
$$ I > III > II > IV > V $$

C
$$ III > I > IV > V > II $$

D
$$ I > III > IV > V > II $$