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Q. No.Match the items of Column I with items of Column II.
Column l
Column ll
A.
Reimer-Tiemann reaction
1.
Conversion of phenol to o-hydroxysalicylic aid
B.
Kolbe's reaction
2.
Heated copper at 573K
C.
Conversion of 2alcohol to a ketone
3.
Reaction of an alkyl halide
with sodium alkoxide
D.
Williamson's synthesis
4.
Conversion of phenol to salicylaldehyde
Codes
A
B
C
D
1.
2
3
4
1
2.
3
4
1
2
3.
1
4
3
2
4.
4
1
2
3
Column l
Column ll
Reimer-Tiemann reaction
Conversion of phenol to o-hydroxysalicylic aid
Kolbe's reaction
Heated copper at 573K
Conversion of 2alcohol to a ketone
Reaction of an alkyl halide
with sodium alkoxide
Williamson's synthesis
Conversion of phenol to salicylaldehyde
Subtopic: Ethers: Preparation & Properties, Uses |
90%
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Select the correct option based on statements below:
| Assertion (A): | The addition reaction of water to but-1-ene in acidic medium yields butan-1-ol. |
| Reason (R): | Addition of water in an acidic medium proceeds through the formation of a primary carbocation. |
| 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: Alcohols: Preparation & Properties |
64%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | p-Nitrophenol is more acidic than phenol. |
| Reason (R): | Nitro group helps in the stabilization of the phenoxide ion by dispersal of negative charge due to resonance. |
| 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: Alcohols: Preparation & Properties |
85%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | The IUPAC name of the compound is 2-ethoxy-2-methylethane. |
| Reason (R): | In IUPAC nomenclature, ether is regarded as a hydrocarbon derivative in which a hydrogen atom is replaced by —OR or -OAr group [where, R = alkyl group and Ar = aryl group]. |
| 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: Ethers: Preparation & Properties, Uses |
59%
From NCERT
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Select the correct option based on the statements below:
| Assertion (A): | The bond angle in ethers is slightly less than the angle of tetrahedral. |
| Reason (R): | There is repulsion between the two bulky (— R) 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. | (A) is False but (R) is True. |
Subtopic: Ethers: Preparation & Properties, Uses |
58%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Boiling points of alcohols and ethers are high. |
| Reason (R): | They can form intermolecular hydrogen bonding. |
| 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: Alcohols: Preparation & Properties |
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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 |
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Select the correct option based on statements below:
| Assertion (A): | o-Nitrophenol is less soluble in water than the m and p-isomers. |
| Reason (R): | m and p-Nitrophenols exist as associated molecules. |
| 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: Phenols: Preparation & Properties |
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Select the correct option based on statements below:
| Assertion (A): | Ethanol is a weaker acid than phenol. |
| Reason (R): | Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH. |
| 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: Phenols: Preparation & Properties |
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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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