Q. No.Which reagents are involved in the Clemmensen reduction of a ketone?
1. \(LiAlH_4\)
2. \(Zn-Hg\) with \(HCl\)
3. Glycol with \(KOH\)
4. \(H_2\) with \(Pt\) as catalyst
1. \(LiAlH_4\)
2. \(Zn-Hg\) with \(HCl\)
3. Glycol with \(KOH\)
4. \(H_2\) with \(Pt\) as catalyst
Subtopic: Aldehydes & Ketones: Preparation & Properties | Name Reaction |
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The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is :
| Item-I | Item-II | ||
| (I) | Benzene | (P) | |
| (II) | Benzonitrile | (Q) | |
| (III) | Benzoyl Chloride | (R) | |
Options:
| (I) | (II) | (III) | |
| 1. | (Q) | (R) | (P) |
| 2. | (R) | (Q) | (P) |
| 3. | (R) | (P) | (Q) |
| 4. | (P) | (Q) | (R) |
Subtopic: Aldehydes & Ketones: Preparation & Properties | Name Reaction |
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Level 1: 80%+
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Match the reaction given in Column I with the corresponding name of the reaction given in Column II.
| Column-I | Column-II | ||
| (a) | C6H5CHO + NaOH ⟶ C6H5COOH + C6H5CH2OH | (i) | Rosenmund reduction |
| (b) | \(\small(C_{6}H_{6} \ + \ CH_{3}Cl \ \xrightarrow[]{Anhyd.AlCl_{3}} C_{6}H_{5}CH_{3}\) | (ii) | Kolbe's reaction |
| (c) | \(\mathrm{RCOCl}+\mathrm{H}_2 \ \xrightarrow[]{Pd/BaSO_{4}} \ \text { RCHO }\) | (iii) | Claisen reaction |
| (d) | C6H5OH + NaOH + CO2 \(\xrightarrow[2. \ H^{+}]{1. \ Heat}\) Salicylic acid | (iv) | Cannizzaro reaction |
| (v) | Friedel-Craft's reaction | ||
The correct match is:
| Options: | (a) | (b) | (c) | (d) |
| 1. | iv | v | i | ii |
| 2. | v | i | ii | iii |
| 3. | v | iii | ii | i |
| 4. | iv | ii | iii | i- |
Subtopic: Name Reaction |
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The formula of a yellow-colored compound formed in the reaction of 2-propanone with sodium hypoiodite is:
| 1. | \(\text I_2\) |
| 2. |  |
| 3. | \(\text {CH}_2 \text I_2\) |
| 4. | \(\text {CH} \text I_3\) |
Subtopic: Name Reaction |
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Level 1: 80%+
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Subtopic: Name Reaction |
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Cannizzaro reaction is an example of disproportionation reaction. What is the reagent used in Cannizzaro reaction?
1. FeCl3
2. NaOH/H2O
3. ZnCl2/H+
4. H2/Pd/BaSO4
1. FeCl3
2. NaOH/H2O
3. ZnCl2/H+
4. H2/Pd/BaSO4
Subtopic: Name Reaction |
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Level 1: 80%+
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Choose the correct match of List I (name reaction) and List II (reagent used in name reaction given in List I):
1. P–(i), Q–(ii), R–(iii), S–(iv)
2. P–(iv), Q–(iii), R–(i), S–(ii)
3. P–(ii), Q–(iii), R–(iv), S–(i)
4. P–(iii), Q–(iv), R–(i), S–(ii)
| List – I | List – II | ||
| P. | Clemmensen's reduction | i. | Conc. KOH |
| Q. | Reimer-Tiemann reaction | ii. | Br2/NaOH |
| R. | Cannizzaro's reaction | iii. | CHCl3/KOH |
| S. | Hoffmann bromamide degradation reaction | iv. | Zn −Hg/HCl |
2. P–(iv), Q–(iii), R–(i), S–(ii)
3. P–(ii), Q–(iii), R–(iv), S–(i)
4. P–(iii), Q–(iv), R–(i), S–(ii)
Subtopic: Name Reaction |
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Level 1: 80%+
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Assertion(A): Lower aldehydes and ketones are soluble in water but the solubility decreases as the molecular masses increase.
Reason(R): Distinction between aldehydes and ketones can be made by Tollen's test.
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 a true statement but R is false.
4. Both A and R are false statements.
Reason(R): Distinction between aldehydes and ketones can be made by Tollen's test.
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 a true statement but R is false.
4. Both A and R are false statements.
Subtopic: Aldehydes & Ketones: Preparation & Properties | Name Reaction |
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Level 1: 80%+
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When toluene is oxidised with chromyl chloride, benzaldehyde is formed. This reaction is known as:
1. Gattermann Koch Synthesis
2. Etard's reaction
3. Schmidt's reaction
4. Friedel Craft reaction
1. Gattermann Koch Synthesis
2. Etard's reaction
3. Schmidt's reaction
4. Friedel Craft reaction
Subtopic: Name Reaction |
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Level 1: 80%+
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Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I (Products formed) |
List - II (Reaction of carbonyl compound with) |
||
| (A) | Cyanohydrin | (I) | NH₂OH |
| (B) | Acetal | (II) | RNH₂ |
| (C) | Schiff's base | (III) | Alcohol |
| (D) | Oxime | (IV) | HCN |
| (A) | (B) | (C) | (D) | |
| 1. | (IV) | (III) | (II) | (I) |
| 2. | (III) | (IV) | (II) | (I) |
| 3. | (II) | (III) | (IV) | (I) |
| 4. | (I) | (III) | (II) | (IV) |
Subtopic: Name Reaction |
90%
Level 1: 80%+
NEET - 2022
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