Entry Test MCQ :: Aldehydes and Ketones
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| 21. |
Which of the following will not give addition reaction with NaHSO3 |
| A. |
HCHO |
B. |
CH3CHO |
| C. |
CH3-CH2-CHO |
D. |
None of the above |
Answer: Option C
Explanation:
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| 22. |
On heating aldehydes with Fehlings solution we get a precipitate whose colour is |
Answer: Option D
Explanation:
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| 23. |
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide? |
| A. |
carbonic acid |
B. |
ethanol |
| C. |
acetic acid |
D. |
methanoic acid |
Answer: Option C
Explanation:
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| 24. |
Aldehyde and ketone have same general formula for homologous series |
| A. |
CnH2nO2n |
B. |
CnH2n |
| C. |
CnH2nO |
D. |
CnH2nOn+1 |
Answer: Option C
Explanation:
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| 25. |
Oxidation of primary alcohol gives |
| A. |
ketone |
B. |
Aldehyde |
| C. |
Alkene then - COOH |
D. |
Ester |
Answer: Option B
Explanation:
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| 26. |
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _____ as promoter |
Answer: Option C
Explanation:
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| 27. |
Ncleophilic addition reactions are catalysed |
Answer: Option C
Explanation:
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| 28. |
Acetaldehyele cyanohydrin on acid hydrolysis yields |
| A. |
Tartaric acid |
B. |
Propanoic acid |
| C. |
Lactic acid |
D. |
Valeric acid |
Answer: Option C
Explanation:
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| 29. |
Acetal on acid hydrolysis generates |
| A. |
Alcohol |
B. |
Ketone |
| C. |
Both a & b |
D. |
None of the above |
Answer: Option C
Explanation:
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| 30. |
Which one exhibits aldol condensation |
| A. |
HCHO |
B. |
C6H5CHO |
| C. |
Cl3CCHO |
D. |
CH3COCH3 |
Answer: Option D
Explanation:
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