Class 12th Board Exam Chemistry Most VVI Objective Question Chapter Wise
12. ALDEHYDES, KETONES & CARBOXYLIC ACIDS
1. HCOOH is a :
(A) Monobasic acid
(B) Di basic acid
(C) tri basic acid
(D) mineral acid
| Answer :- (A) |
2. Aldehydes without a-hydrogen atom undergoes :
(A) Cannizzaro Reaction
(B) Aldol Condensation
(C) Perkin Reaction
(D) None of these
| Answer :- (A) |
3. IUPAC name of CH3-CO-CH3 is :
(A) Propanone
(B) Propane
(C) Propanol
(D) Propene
| Answer :- (A) |
4. The general formula of ketone is :
(A) R-CH2OH
(B) R-CO-R1
(C) R-COOH
(Dj None of these
| Answer :- (B) |
5. Which of the following undergoes Aldol condensation ?
(A) CH3COOH
(B) CH3CHO
(C) C6H5CHO
(D) CH3-COOCH3
| Answer :- (B) |
6. Which of the following acids is found in Vinegar ?
(A) HCOOH
(B) CH3COOH
(C) C2H5COOH
(D) None of these
| Answer :- (B) |
7. Which organic acid gives silver mirror test ?
(A) CH3COOH
(B) HCOOH
(C) CH2– CH2-COOH
(D) CH2-CH (OH) – COOH
| Answer :- (B) |
8. The general formula of alkanal is :
(A) CH(2n + 1) O
(B) CnH2nO
(C) CnH2n-2
(D) CnH2nO2
| Answer :- (B) |
9. Which arrangement is correct regarding acidic strength ?
(A) HCOOH > CH3COOH > C6H5 – OH
(B) C6H5 – OH >CH3COOH > HCOOH
(C) CH3COOH > HCOOH > C6H5 – OH
(D) HCOOH > C6H5 – OH > CH2COOH
| Answer :- (A) |
10. Which of the following compounds will undergo Cannizzaro reaction ?
(A) CH3CHO
(B) CH3COCH3
(C) C6H5CHO
(D) C6H5CH2CHO
| Answer :- (C) |
11. Benzoyl chloride on reduction with H2/Pd-BaSO4 produces :
(A) benzoic acid
(B) benzyl alcohol
(C) benzoyl sulphate
(D) benzaldehyde
| Answer :- (D) |
12. What is the testto differentiate between pentan-2-one and pentan-3-one ?
(A) Iodoform test
(B) Benedict’s test
(C) Fehling’s test
(D) Aldol condensation test
| Answer :- (A) |
13. Which of the following does not undergo Cannizzaro’s reaction ?
(A) Benzaldehyde
(B) 2-Methylpropanal
(C) p-Methoxybenzaldehyde
(D) 2,2-Dimethylpropanal
| Answer :- (B) |
14. Which compound does not decompose on heating?
(A) Na2CO3
(B) ZnCO3
(C) Al2(CO3)2
(D) CaCO3
| Answer :- (A) |
15. The reagent [X] in this reaction is :
(A) H2/Ni
(B) LiAIH4
(C) NaBH4
(D) H2/Pd
| Answer :- (C) |
16. IUPAC name of CH3COOH is
(A) Methanoic acid
(B) Ethanoic acid
(C) Propanoic acid
(D) Methanol
| Answer :- (B) |
17. Carbon atom in the carobnyl group is :
(A) sp-hybridised
(B) sp2 hydridised
(C) sp3 hydridised
(D) dsp2 hydridised
| Answer :- (B) |
18. Which of the following undergoes Cannizaro’s reaction?
(A) CH3CHO
(B) CH3CH2CHO
(C) (CH3)2CHCHO
(D) HCHO
| Answer :- (D) |
19. Paraldehyde is a trimer of:
(A) Methanol
(B) Ethanol
(C) Butanol
(D) None
| Answer :- (B) |
20. The product formed by heating calcium formate is :
(A) Formaldehyde
(B) Acetaldehyde
(C) Acetone
(D) Formic acid
| Answer :- (B) |
21. Glycerol is :
(A) Monohydric alcohol
(B) dihydric alcohol
(c) Trihydric alcohol
(D) Primary alcohol
| Answer :- (C) |
20. The cannizzaro’s reaction is not given by :
(A) Formaldehyde
(B) Acetaldehyde
(C) Benzaldehyde
(D) Furfural
| Answer :- (B) |
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