1
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the compounds A, B, C and D.

$$ \text { 1,2,2,2-tetrachloroethane } \xrightarrow[\Delta]{\mathrm{Zn}}[\mathrm{A}] $$

[A] $$ \xrightarrow[675 \mathrm{~K}]{\text { Fe tube }} $$ [B] $$ \xrightarrow[\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4]{\text { Conc. } \mathrm{HNO}_3} $$ [C] $$ \xrightarrow[\text { Anhydrous } \mathrm{AlCl}_3]{\mathrm{Cl} /}$$ [D]

A
COMEDK 2023 Evening Shift Chemistry - Haloalkanes and Haloarenes Question 7 English Option 1
B
COMEDK 2023 Evening Shift Chemistry - Haloalkanes and Haloarenes Question 7 English Option 2
C
COMEDK 2023 Evening Shift Chemistry - Haloalkanes and Haloarenes Question 7 English Option 3
D
COMEDK 2023 Evening Shift Chemistry - Haloalkanes and Haloarenes Question 7 English Option 4
2
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The reactions taking place with $$\mathrm{2- Phenyl-2-bromopropane}$$ as the starting material is shown below. Identify [A] and [B] formed in the reaction.

$$ \mathrm{C}_6 \mathrm{H}_5-\mathrm{C}\left(\mathrm{CH}_3\right)_2^{-} \mathrm{Br} \xrightarrow[\Delta]{\text { KOH Alcoholic }}[\mathrm{A}] $$

$$ [\mathrm{A}]+\mathrm{HBr} \xrightarrow{\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CO})_2 \mathrm{O}\right.}[\mathrm{B}]$$

A
$$[\mathrm{A}]=2$$-Phenylpropene $$[\mathrm{B}]=2$$-Phenyl-1- bromopropane
B
$$[\mathrm{A}]=2$$ - Phenylpropan-2-ol $$[\mathrm{B}]=2$$-Phenyl-2-bromopropene
C
$$[\mathrm{A}]=2$$-Bromopropene $$[\mathrm{B}]=1$$-Bromopropane
D
$$ [A]=4 \text {-Hydroxyphenyl-2-bromopropane } \quad[B]=4 \text {-Hydroxyphenylpropene } $$
3
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following will undergo Nucleophilic substitution, by $$\mathrm{S}_{\mathrm{N}}{ }^1$$ mechanism, fastest?

A
$$ \mathrm{Br}-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2 $$
B
$$ \mathrm{C}_6 \mathrm{H}_5 \mathrm{Br} $$
C
$$ \mathrm{CH}_3-\mathrm{CH}=\mathrm{CHBr} $$
D
$$ \mathrm{C}_6 \mathrm{H}_{11} \mathrm{Br} $$
4
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Alkyl halides undergoing SN2 reaction do inverse

A
racemic mixture
B
retention of configuration
C
formation of carbocation
D
inversion of configuration
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