The group that activates benzene ring towards electrophilic substitution reaction is-

1. OH 2. NO2
3. CN 4. COOH
Subtopic:  Electrophilic Substitution Reactions, Uses of Phenols |
 78%
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Select the correct option based on statements below:

Assertion (A): -OH, -OCH3 groups are o, p-directing.
Reason (R): Ring is activated by the resonance effect of -OH, -OCH3 groups.
  
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Electrophilic Substitution Reactions, Uses of Phenols |
 77%
From NCERT
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An appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene is/are : 
 

1.
2.
3.
4.

Subtopic:  Electrophilic Substitution Reactions, Uses of Phenols |
 78%
From NCERT
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Select the correct option based on statements below:

Assertion (A): Phenol forms 2,4,6-tribromophenol on treatment with Br2 in carbon disulphide at 273K.
Reason (R): Bromine polarises in carbon disulphide.
  
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Electrophilic Substitution Reactions, Uses of Phenols |
 72%
From NCERT
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The alkoxy group in aryl alkyl ethers activate the benzene ring towards -

1. Nucleophilic addition reaction

2. Electrophilic addition reaction

3. Nucleophilic substitution reaction

4. Electrophilic substitution reaction

Subtopic:  Electrophilic Substitution Reactions, Uses of Phenols |
 61%
From NCERT
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Select the correct option based on statements below:

Assertion (A): Like the bromination of benzene, bromination of phenol is carried out in the presence of Lewis acid.
Reason (R): Lewis acid polarizes the bromine molecule.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
Subtopic:  Electrophilic Substitution Reactions, Uses of Phenols |
From NCERT
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Select the correct option based on the statements below:

Assertion (A): Phenols give o-and p-nitrophenol on nitration with conc. HNO3 and H2SO4 mixture.
Reason (R): —OH group in phenol is o-, p-directing.
 
1. Both (A) and (R) are true, and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Electrophilic Substitution Reactions, Uses of Phenols |
From NCERT
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