- 1(current)
Q. No.| Assertion(A): | Aldol condensation is usually carried out in a dilute solution of a strong base. |
| Reason(R): | Concentrated solution of strong base involves Cannizzaro reaction. |
| 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 statements. |
Subtopic: Name Reaction |
80%
From NCERT
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Consider the given two statements:
| Assertion(A): | Formic acid reduces Tollen's reagent. |
| Reason(R): | Compounds containing the —CHO group reduce Tollen's reagent. |
| 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: Name Reaction |
From NCERT
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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 |
90%
From NCERT
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Given below are two statements:
| Assertion (A): | Isobutanal does not give an iodoform test. |
| Reason (R): | It does not have \(\alpha-\)hydrogen. |
| 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: Name Reaction |
60%
From NCERT
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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%
From NCERT
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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%
From NCERT
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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%
From NCERT
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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 |
From NCERT
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- 1(current)
Q. No.
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