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Q. No.
Assertion (A):
In presence of NaBH4, \(~~~~~~~~~~~~~~~~~~~~~~~~~O\\ ~~~~~~~~~~~~~~~~~~~~~~~~~\|\\ CH_2=CH-C-H\) is reduced to give \(CH_3-CH_2-CH_2OH.\)
Reason (R):
NaBH4 reduces conjugated double bonds also.
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: Aldehydes & Ketones: Preparation & Properties |
62%
Level 2: 60%+
Hints
Assertion(A): Acetic acid is a weaker acid than formic acid.
Reason(R): +l effect of CH3 makes the acetic acid weaker.
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): +l effect of CH3 makes the acetic acid weaker.
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: Carboxylic Acids: Preparation & Properties |
92%
Level 1: 80%+
Hints
| Assertion (A): | Benzaldehyde is less reactive than acetaldehyde towards nucleophiles. |
| Reason (R): | Carbonyl carbon in benzaldehyde has less positive charge than that of carbonyl carbon in acetaldehyde 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. | Both (A) and (R) are false. |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
79%
Level 2: 60%+
Hints
Assertion(A): \(~~~~~~~~~~~~O\\ ~~~~~~~~~~~~\|\\ HO-C-CH_3 \) does not undergo haloform reaction.
Reason(R): It has no \(\alpha-\)hydrogen atom.
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): It has no \(\alpha-\)hydrogen atom.
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: Name Reaction |
54%
Level 3: 35%-60%
Hints
Assertion(A): In crossed Cannizarro's reaction, HCHO is oxidized while C6H5CHO is reduced.
Reason(R): Nucleophile (OH-) attacks on HCHO. Hence, formaldehyde is oxidized.
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): Nucleophile (OH-) attacks on HCHO. Hence, formaldehyde is oxidized.
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: Name Reaction |
82%
Level 1: 80%+
Hints
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| Assertion (A): | Formic acid can be oxidized to carbonic acid. |
| Reason (R): | Formic acid does not give brisk effervescence with NaHCO3. |
| 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: Carboxylic Acids: Preparation & Properties |
53%
Level 3: 35%-60%
Hints
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Given below are two statements:
| Assertion (A): | Aldehydes and ketones give nucleophilic addition reaction but acyl derivatives give nucleophilic substitution reaction. |
| Reason (R): | Aldehydes and ketones contain stronger bases and poor leaving groups in comparison to acyl derivatives. |
| 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: Aldehydes & Ketones: Preparation & Properties | Acid Derivatives - Preparation, Properties & Uses |
Level 4: Below 35%
Hints
Match the chemical composition in List-I with its name in List-II.
Choose the correct answer from the options given below:
| List-I (Chemical Composition) |
List-II (Reagent) |
||
| (A) | Benzenesulphonyl chloride | (I) | Tollen's reagent |
| (B) | Anhydrous ZnCl2 + Conc. HCl | (II) | Fehling A solution |
| (C) | Ammoniacal silver nitrate | (III) | Hinsberg's reagent |
| (D) | Aqueous CuSO4 solution | (IV) | Lucas reagent |
| (A) | (B) | (C) | (D) | |
| 1. | (IV) | (III) | (I) | (II) |
| 2. | (III) | (IV) | (I) | (II) |
| 3. | (III) | (IV) | (II) | (I) |
| 4. | (I) | (II) | (IV) | (III) |
Subtopic: Name Reaction |
89%
Level 1: 80%+
Hints
Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Assertion (A): | Acetic acid is more acidic than phenol. |
| Reason (R): | Acetate ion is more stable than phenoxide ion. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 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: Carboxylic Acids: Preparation & Properties |
77%
Level 2: 60%+
Hints
Identify the reaction(s) which do not give n-propyl benzene as a major product:
Choose the correct answer from the options given below:
1. A only
2. A and B only
3. C and D only
4. D only
| A. |  |
| B. |  |
| C. |  |
| D. |  |
Choose the correct answer from the options given below:
1. A only
2. A and B only
3. C and D only
4. D only
Subtopic: Name Reaction |
Level 3: 35%-60%
Hints
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