Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A):   undergoes \(S_N2\) reaction faster than 
Reason (R): Iodine is a better leaving group because of its larger size.

In the light of the above statements, choose the correct answer from the options given below :
1. (A) is True but (R) is False
2. (A) is False but (R) is True
3. Both (A) and (R)  are True and (R) is the correct explanation of (A)
4. Both (A) and (R) are True but (R) is not the correct explanation of (A)
Subtopic:  Mechanism of Reactions |
 76%
From NCERT
NEET - 2025
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The compound that will undergo \(S_N~^1\) reaction with the fastest rate is: 
1. 2.
3. 4.
Subtopic:  Mechanism of Reactions |
 72%
From NCERT
NEET - 2024
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The major product C in the below-mentioned reaction is: 
 
1. Propan-1-ol 2. Propan-2-ol
3. Propane 4. Propyne
Subtopic:  Mechanism of Reactions |
 82%
From NCERT
NEET - 2024

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Among the following, which hydrolysis reaction occurs at the slowest rate:
1. 
2. 
3. 
4. 
Subtopic:  Mechanism of Reactions |
 67%
From NCERT
NEET - 2019
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Consider the reaction,

This reaction will be the fastest in:

1. Ethanol

2. Methanol

3. N, N'-dimethylformamide (DMF)

4. Water

Subtopic:  Mechanism of Reactions | Chemical Properties |
 78%
From NCERT
NEET - 2016
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The end product (C) in the below-mentioned reaction is:
\(H_3C-Br\xrightarrow{\bf KCN }A\xrightarrow{ \bf H_3O^+~~}B\xrightarrow[\bf\text{Ether}]{~~LiAlH_4~~}C\)


1. Acetone
2. Methane
3. Acetaldehyde
4. Ethyl alcohol
Subtopic:  Mechanism of Reactions |
 61%
From NCERT
AIPMT - 2012
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Which of the following compounds undergoes nucleophilic substitution reaction most easily?

1. 2.
3. 4.
Subtopic:  Mechanism of Reactions |
 79%
From NCERT
AIPMT - 2011
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Consider the reactions:

(i) \(\small{{(CH_3)}_2CHCH_2Br\ \xrightarrow[]{C_2H_5OH}{(CH_3)}_2CHCH_2OC_2H_5 + HBr}\)    
(ii) \(\small{{(CH_3)}_2CHCH_2Br\ \xrightarrow[]{C_2H_5O^-}{(CH_3)}_2CHCH_2OC_2H_5 + Br^-}\)    

The mechanisms of reactions (i) and (ii) are, respectively:
1. SN2 and SN1
2. SN1 and SN2
3. SN1 and SN1
4. SN2 and SN2
Subtopic:  Mechanism of Reactions |
 53%
From NCERT
AIPMT - 2011
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Which of the following reactions cannot form new carbon-carbon bonds?

1. Reimer-Tiemann reaction

2. Cannizaro reaction

3. Wurtz reaction

4. Friedel-Crafts acylation

Subtopic:  Mechanism of Reactions |
 63%
From NCERT
AIPMT - 2010
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Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

1. Ethyl chloride

2. Isopropyl chloride

3. Benzyl chloride

4. Chlorobenzene

Subtopic:  Mechanism of Reactions |
 54%
From NCERT
AIPMT - 2005
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