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Q. No.Select the correct option based on statements below:
Assertion (A):
The α -hydrogen atom in carbonyl compounds is less acidic.
Reason (R):
The anion formed after the loss of the α -hydrogen atom is resonance stabilized.
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: Isomers & Reaction Mechanism |
67%
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Select the correct option based on statements below:
| Assertion (A): | Aromatic aldehydes and formaldehydes undergo the Cannizzaro reaction. |
| Reason (R): | Aromatic aldehydes are almost as reactive as formaldehyde. |
| 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: Isomers & Reaction Mechanism |
61%
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Select the correct option based on statements below:
| Assertion (A): | Aldehydes and ketones both react with Tollen’s reagent to form a silver mirror. |
| Reason (R): | Both aldehydes and ketones contain a carbonyl 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: Name Reaction |
77%
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Select the correct option based on statements below:
| Assertion (A): | Compounds containing —CHO group are easily oxidised to corresponding carboxylic acids. |
| Reason (R): | Carboxylic acids can be reduced to alcohol by treatment with LiAlH4. |
| 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: Isomers & Reaction Mechanism |
79%
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Select the correct option based on the statements below:
| Assertion (A): | The geometry of formaldehyde molecule is planar. |
| Reason (R): | Formaldehyde molecule contains sp2 hybridized carbon 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 True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Carboxylic Acids: Preparation & Properties |
85%
From NCERT
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Match the example in Column I with the name of the reaction in Column II.
| Column l (Example) |
Column ll (Reaction) |
A.  |
1. Friedel-Crafts acylation |
B.  |
2. HVZ reaction |
C.  |
3. Aldol condensation |
D.  |
4. Rosenmund Reaction |
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 4 | 2 |
| 3. | 3 | 4 | 1 | 2 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Name Reaction |
91%
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Match the reactions given in Column I with the suitable reagents given in Column II.
| Column l (Reactions) |
Column ll (Reagents) |
| A. Benzophenone → Diphenylmethane | 1. LiAlH4 |
| B. Benzaldehyde → 1-Phenylethanol | 2. DlBAL-H |
| C. Cyclohexanone → Cyclohexanol | 3. Zn(Hg)/Conc.HCl |
| D. Phenyl benzoate → Benzaldehyde | 4. CH3MgBr |
Codes:
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 4 | 1 | 2 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 2 | 1 |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
78%
From NCERT
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Match the acids given in Column I with their correct IUPAC names given in Column II and mark the appropriate option:
| Column l (Acids) |
Column ll (IUPAC names) |
| A. Phthalic acid | 1. Hexane-1,6-dioic acid |
| B. Glutaric acid | 2. Benzene-1,2-dicarboxylic acid |
| C. Succinic acid | 3. Pentane-1,5-dioic acid |
| D. Adipic acid | 4. Butane-1,4-dioic acid |
Codes:
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 4 | 2 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 2 | 1 |
Subtopic: Carboxylic Acids: Preparation & Properties |
79%
From NCERT
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Match the common names given in Column I with the IUPAC names given in Column II.
| Column l (Common names) |
Column ll (IUPAC names) |
| A. Cinnamaldehyde | 1. Pentanal |
| B. Acetophenone | 2. Prop-2-enal |
| C. Valeraldehyde | 3. 1-Phenylethanone |
| D. Acrolein | 4. 3-Phenylprop-2-en-al |
Codes:
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 4 | 2 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
73%
From NCERT
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Benzophenone can be obtained by:
a. Benzoyl chloride + Benzene
b. Benzoyl chloride + Diphenyl cadmium
c. Benzoyl chloride + Phenyl magnesium chloride
d. Benzene + Carbon monoxide
Choose the correct option
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
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