The major product formed in the dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is based on:

1. Hofmann Rule 2. Huckel's Rule
3. Saytzeff's Rule 4. Hund's Rule

Subtopic:  Chemical Properties |
 84%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Find the correct sequence of the bond enthalpy of the "C-X" bond among the following:

1. CH3-F < CH3-Cl > CH3-Br > CH3-I

2. CH3-Cl > CH3-F > CH3-Br > CH3-I

3. CH3-F < CH3-Cl < CH3-Br < CH3-I

4. CH3-F > CH3-Cl > CH3-Br > CH3-I

Subtopic:  Introduction and Physical Properties | Chemical Properties |
 61%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An organic compound A(C4H9Cl) in reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. A is:

1. t-butyl chloride
2. sec. butyl chloride
3. Iso butyl chloride
4. n-butyl chloride

Subtopic:  Chemical Properties |
 69%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh


obtained by chlorination of n-butane, will be:
1.  Meso form
2.  Racemic mixture
3.  d-form
4.  l-form

Subtopic:  Isomerism & Chirality |
 83%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

 \(CH_3CH_2CHCl_2\) upon reaction with \(NaNH_2\)gives:

1. 2.
3. 4.

Subtopic:  Chemical Properties |
 62%
From NCERT
AIPMT - 2002
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Given below is a reaction sequence:
\(\begin{aligned} & CH_3CH_2Cl\xrightarrow{NaCN}X\xrightarrow{H_2/Ni}Y\\ &Y\xrightarrow{\text{Acetic Anhydride}}Z \end{aligned}\)

Z in the above reaction is:

1. CH3CH2CH2NHCOCH3

2. CH3CH2CH2NH2

3. CH3CH2CH2CONHCH3

4. CH3CH2CH2CONHCOCH3

Subtopic:  Chemical Properties |
 73%
From NCERT
AIPMT - 2002
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The reactivity order of halides for dehydrohalogenation is:

1. R–F > R–Cl > R–Br > R–I

2. R–I > R–Br > R–Cl > R–F

3. R–I > R–Cl > R–Br > R–F

4. R–F > R–I > R–Br > R–Cl

Subtopic:  Chemical Properties |
 79%
From NCERT
AIPMT - 2002
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl using: 

1. Hypochlorous acid 2. Chlorine
3. Hydrochloric acid 4. Phosphorous pentachloride
Subtopic:  Chemical Properties |
 71%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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 |
From NCERT
AIPMT - 2005
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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 |
 52%
From NCERT
AIPMT - 2011
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh