The elimination reaction among the following is:

1. CH3CH3+Cl2CH3CH2Cl+ HCl

2. CH3Cl+ KOH(aq.) CH3OH +KCl

3. CH2=CH2 +Br2 CH2BrCH2Br

4. C2H5Br+ KOH(alc.) C2H4 + KBr+H2O

Subtopic:  Reaction Intermediates |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Which of the following is an example of the elimination reaction?

(1) Chlorination of methane

(2) dehydration of ethanol

(3) nitration of benzene

(4) hydroxylation of ethylene

 

Subtopic:  Reaction Intermediates |
 84%
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints

The formation of cyanohydrin from a ketone is an example of:

(1) electrophilic addition

(2) nucleophilic addition

(3) nucleophilic substitution

(4) electrophilic substitution

Subtopic:  Addition Reaction of C=N, C=0 |
 69%
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints

The compound which reacts with HBr obeying Markownikoff's rule is:

1. CH2=CH2   

2. 

3. 

4. 

Subtopic:  Addition Reaction of C=C |
 61%
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints

If X is halogen the correct order for SN2 reactivity is-

1. R2CHX > R3CX > RCH2X

2. RCH2X > R3CX > R2CHX

3. RCH2X > R2CHX > R3X

4. R3CX > R2CHX > RCH2X

Subtopic:  SN1 & SN2 Reactions |
 80%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Consider the following bromides:

the correct order of SN1 reactivity is:

1. A>B>C

2. B>C>A

3. B>A>C

4. C>B>A

Subtopic:  SN1 & SN2 Reactions |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

In an SN1 reaction on chiral centres there is

1. 100% racemisation

2. inversion more than retention leading to partial racemisation

3. 100% retention

4. 100% inversion

Subtopic:  SN1 & SN2 Reactions |
 60%
NEET - 2015
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints

SN1 mechanism for the reaction,

R-X+KOHROH+KX follow:

(1) carbocation mechanism

(2) carbanion mechanism

(3) free radical mechanism

(4) either of these

Subtopic:  SN1 & SN2 Reactions |
 75%
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints

Which step is chain propagation step in the following mechanism?

(i) Cl2hνCl+Cl
(ii) Cl+ CH4CH3+ HCl
(iii)Cl+ClCl2
(iv)CH3+ HClCH3Cl

1. (i)

2. (ii)

3. (iii)

4.  (iv)

Subtopic:  Addition Reaction of C=N, C=0 |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Which step is the chain termination step in the following mechanism?

(i) Cl2hνCl+Cl
(ii) Cl+ CH4CH3+ HCl
(iii)CH3+Cl2CH3Cl+Cl
(iv)Cl+CH3CH3Cl

1. (i)

2. (ii)

3. (iii)

4. (iv)

Subtopic:  Reaction Intermediates |
 71%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh