1. : Which reagent will react with both aldehyde and ketone?
(A) Grignard reagent
(B) Sodium nitroprusside
(C) Fehling’s reagent
(D) Tollen’s reagent
2. : Acetone can be converted into pinacol by
(A) Na/Hg
(B) Zn/Hg
(C) Mg/Hg
(D) All of these
3. : Which compounds will not give iodoform test on treatment with I2/NaOH?
(A) 2-Butanone
(B) 3-Pentanone
(C) Acetone
(D) Acetaldehyde
4. : Carbonyl compounds react with hydroxylamine to form ___________.
(A) Hyrazone
(B) Cyanohydrin
(C) Oxime
(D) None of these
5. : Which test is not given by aldehyde?
(A) Sodium nitroprusside test
(B) Fehling solution test
(C) 2,4-DNP test
(D) NaHSO3 test
6. : Paraldehyde is helpful and used as_________.
(A) Poison
(B) Dye
(C) Polymer
(D) Medicine
7. : The correct order of reactivity of CH3CHO, C₂H3COCH, and CH3COCH3 is
CH3CHO > C₂H5COCH3″ onclick=”checkAnswer(‘q7’, ‘CH3CHO > CH3COCH3 > CH3COC2H5’)”> (A) CH3COCH > CH3CHO > C₂H5COCH3
CH3COCH3 > CH3CHO” onclick=”checkAnswer(‘q7’, ‘CH3CHO > CH3COCH3 > CH3COC2H5’)”> (B) C₂H3COCH > CH3COCH3 > CH3CHO
CH3COCH3 > CH3COC2H5″ onclick=”checkAnswer(‘q7’, ‘CH3CHO > CH3COCH3 > CH3COC2H5’)”> (C) CH3CHO > CH3COCH3 > CH3COC2H5
C2H5COCH3 > CH3CHO” onclick=”checkAnswer(‘q7’, ‘CH3CHO > CH3COCH3 > CH3COC2H5’)”> (D) CH3COCH3 > C2H5COCH3 > CH3CHO
8. : Which has most acidic hydrogen?
(A) Hexanone
(B) 2,3-Hexanedione
(C) 2,5-Hexanedione
(D) Hexanedione
9. : Industrial production of acetaldehyde is done by
(A) Oxidation of ethanol
(B) Oxidation of ethylene in the presence of catalyst
(C) Reduction of acetic acid
(D) Hydration of acetylene
10. : In which compounds, carbon number is decreased during oxidation?
(A) Formaldehyde
(B) Aldehyde
(C) Ketone
(D) Ethanol
11. : Which will not show haloform reaction?
(A) CH3CHO
(B) C6H5CHO
(C) CH3COCH3
(D) C6H5COCH3
12. : What is a mixed ketone?
(A) Acetone
(B) Diethyl ketone
(C) Benzophenone
(D) Acetophenone
13. : Which aldehyde is most reactive?
(A) HCHO
(B) CH3CHO
(C) C2H5CHO
(D) C6H5CHO
14. : The condensation between formaldehyde and acetaldehyde in the presence of conc. NaOH and heat gives
(A) Mixture of CH3CH2OH and HCOO–Na+
(B) Mixture of CH3OH and CH3COO–Na+
(C) Acrolein
(D) None of these
15. : The reagent which can be helpful and used to distinguish acetophenone from benzophenone is
(A) 2,4-Dinitrophenyl hydrazine
(B) I2 and NaOH
(C) Benedict reagent
(D) LiAlH4
16. : Ketones are prepared by the oxidation of
(A) Primary alcohol
(B) Tertiary alcohol
(C) Secondary alcohol
(D) None of these
17. : When a formaldehyde solution is evaporated to dryness, a white crystalline solid is obtained. This is known as
(A) Formose
(B) Hexa methylene tetramine
(C) Trioxy methylene
(D) Para formaldehyde
18. : Which does not give Cannizzaro’s reaction?
(A) Benzophenone
(B) Benzaldehyde
(C) Acetaldehyde
(D) Formaldehyde
19. : The C-atom in aldehyde and ketone is _________ hybridized
(A) sp3
(B) sp
(C) dsp
(D) sp2
20. : Which is least reactive?
(A) C2H3CHO
(B) C6H5CHO
(C) CH3CHO
(D) HCHO
21. : Schiff’s reagent gives pink color with ________.
(A) Acetic acid
(B) Acetone
(C) Acetaldehyde
(D) Methyl acetate
22. : Which test is used to distinguish between aldehyde and ketone?
(A) Fehling solution test
(B) Schiff reagent test
(C) Tollen’s reagent test
(D) Sodium nitroprusside test
23. : Which will undergo nucleophilic addition reaction more easily?
(A) Amines
(B) Aldehyde
(C) Ketone
(D) Alkene
24. : Aldol consists of
(A) Hydroxyl group
(B) Aldehyde group
(C) Carboxylic group
(D) Both A and B
25. : Calcium formate on dry distillation yields
(A) Formaldehyde
(B) Acetaldehyde
(C) Formic acid
(D) Ketone
26. : Which reaction is not given by acetone?
(A) Iodoform reaction
(B) Reduction of Fehling’s solution
(C) Formation of an addition compound with sodium hydrogen sulfite
(D) Formation of crystals with 2,4-dinitrophenyl hydrazine
27. : Which is the strongest reducing agent?
(A) C3H7OH
(B) CH3COCH3
(C) HCHO
(D) C2H5OH
28. : What will happen when aldehyde reacts with Tollen’s reagent?
(A) A ketone is formed
(B) An alcohol is formed
(C) Ag+ ions are reduced to metallic silver (silver mirror)
(D) Ag+ ions are produced
29. : The red brown ppt of Fehling solution and Benedict solution tests are of ______.
(A) AgBr
(B) Cu2O
(C) CuO
(D) Ag
30. : Ketone on reduction produces which of the following?
(A) Secondary alcohol
(B) Primary alcohol
(C) Tertiary alcohol
(D) Acetic acid
31. : Which statement regarding carbonyl group is not correct?
(A) The aryl group in aromatic aldehydes speeds up the addition reaction across the carbonyl group
(B) The carbon atom of carbonyl group in the transition state formed during the addition reaction across the carbonyl group is sp3 hybridized
(C) The carbon atom of carbonyl group in aldehydes is sp2 hybridized
(D) An aryl group stabilizes the aldehyde more than the transition state
32. : Reactivity of carbonyl compounds is due to
(A) Electrophilic carbon
(B) Unsaturation
(C) Less steric hindrance
(D) All of these