Entry Test MCQ :: Aldehydes and Ketones
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| 1. |
Which of the following substance produce acetaldehyde on dry distillation? |
| A. |
(CH3COO)2Ca |
B. |
(HCOO)2Ca |
| C. |
both (a) and (b) |
D. |
none |
Answer: Option C
Explanation:
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| 2. |
Which of the following will have the highest boiling point? |
| A. |
methanal |
B. |
ethanal |
| C. |
propanal |
D. |
hexanone |
Answer: Option D
Explanation:
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| 3. |
Which of the following reaction is not shown by ketones? |
| A. |
reaction with HCN |
B. |
reaction with NaHSO3 |
| C. |
reaction with 2 4 dinitrophenyl hydrazine |
D. |
reaction with Fehling solution |
Answer: Option D
Explanation:
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| 4. |
The carbon atom of carbonyl group is |
| A. |
sp hybridized |
B. |
sp2 hybridized |
| C. |
cp3 hybridized |
D. |
dsp2 hybridized |
Answer: Option B
Explanation:
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| 5. |
Which of the following substances does not give iodoform test? |
| A. |
acetaldehyde |
B. |
ethyl alcohol |
| C. |
methyl alcohol |
D. |
acetone |
Answer: Option C
Explanation:
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| 6. |
Formalin is _______ % solution of formaldehyde in water |
Answer: Option C
Explanation:
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| 7. |
Which of the following aldehydes shows rapid reaction with sodium nitroprusside? |
| A. |
formaldehyde |
B. |
accetaldehyde |
| C. |
benzaldehyde |
D. |
acetone |
Answer: Option D
Explanation:
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| 8. |
Acetone reacts with HCN to form a cyanohydrin. It is an example of |
| A. |
electronphilic addition |
B. |
electrophilic substitution |
| C. |
nucleophilic addition |
D. |
nucleophilic substitution |
Answer: Option C
Explanation:
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| 9. |
Which of the following compounds will react with Tollens reagent? |
| A. |
CH3-CHO |
B. |
CH3-CH-CH3 |
| C. |
CH3-COOH |
D. |
CH3-CO-CH2-CH3 |
Answer: Option A
Explanation:
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| 10. |
Which of the following reactions may be assoclated with aldehyde and ketone? |
| A. |
nucleophile addition |
B. |
polymerization |
| C. |
oxidation |
D. |
all of the above |
Answer: Option D
Explanation:
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