

MCQOPTIONS
This section includes 51 Mcqs, each offering curated multiple-choice questions to sharpen your VITEEE knowledge and support exam preparation. Choose a topic below to get started.
1. |
Ketones are comparatively less reactive than aldehdye. It is due to |
A. | alkyl groups are electron donating |
B. | steric hindrance |
C. | both (a) and (b) |
D. | none |
Answer» D. none | |
2. |
Which of the following reagents will react with both aldehydes and ketones? |
A. | Grignard reagent |
B. | Tollens reagent |
C. | Fehlings reagent |
D. | Benedicts reagent |
Answer» B. Tollens reagent | |
3. |
Cannizzaros reaction is not given by |
A. | formaldehyde |
B. | acetaldehyde |
C. | benzaldehyde |
D. | trimethyl acetaldehyde |
Answer» C. benzaldehyde | |
4. |
|
|
A. | nucleophile addition | |
B. | polymerization | |
C. | oxidation | |
D. | all of the above | |
Answer» E. | ||
5. |
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» B. CH3-CH-CH3 | |
6. |
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» D. nucleophilic substitution | |
7. |
Which of the following aldehydes shows rapid reaction with sodium nitroprusside? |
A. | formaldehyde |
B. | accetaldehyde |
C. | benzaldehyde |
D. | acetone |
Answer» E. | |
8. |
|
|
A. | 10% | |
B. | 20% | |
C. | 40% | |
D. | 60% | |
Answer» D. 60% | ||
9. |
Which of the following substances does not give iodoform test? |
A. | acetaldehyde |
B. | ethyl alcohol |
C. | methyl alcohol |
D. | acetone |
Answer» D. acetone | |
10. |
The carbon atom of carbonyl group is |
A. | sp hybridized |
B. | sp2 hybridized |
C. | cp3 hybridized |
D. | dsp2 hybridized |
Answer» C. cp3 hybridized | |
11. |
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» E. | |
12. |
|
|
A. | methanal | |
B. | ethanal | |
C. | propanal | |
D. | hexanone | |
Answer» E. | ||
13. |
Which of the following substance produce acetaldehyde on dry distillation? |
A. | (CH3COO)2Ca |
B. | (HCOO)2Ca |
C. | both (a) and (b) |
D. | none |
Answer» D. none | |
14. |
The product formed in Aldol condensation is [CBSE AIPMT 2007] |
A. | a beta-hydroxy aldehyde or a beta-hydroxy ketone |
B. | an alpha-hydroxy aldehyde or ketone |
C. | an alpha, beta unsaturated ester |
D. | a beta-hydroxy acid |
Answer» B. an alpha-hydroxy aldehyde or ketone | |
15. |
Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc.HCl is called [CBSE AIPMT 2007] |
A. | Cope reduction |
B. | Dow reduction |
C. | Wolff-Kishner reduction |
D. | Clemmensen reduction |
Answer» E. | |
16. |
A strong base can abstract an a-hydrogen from [CBSE AIPMT 2008] |
A. | Amine |
B. | Alkane |
C. | Alkene |
D. | Ketone |
Answer» E. | |
17. |
In which of the following reactions new carbon-carbon bond is not formed [WB JEE 2009] |
A. | Cannizzaro reaction |
B. | Wurth reaction |
C. | Aldol condensation |
D. | Friedel-Crafts reaction |
Answer» B. Wurth reaction | |
18. |
For making distinction between 2-pentanone and 3-pentanone the reagent to be employed is [WB JEE 2009] |
A. | K2Cr2O7/H2SO4 |
B. | Zn-Hg/HCl |
C. | SeO2 |
D. | Iodine/NaOH |
Answer» E. | |
19. |
The compound which forms acetaldehyde when heated with dilute NaOH is [Karnataka CET 2009] |
A. | 1 chloro ethane |
B. | 1, 1 dichloro ethane |
C. | 1, 2 dichloro ethane |
D. | 1, 1, 1 trichloro ethane |
Answer» C. 1, 2 dichloro ethane | |
20. |
Compound 'A' undergoes formation of cyanohydrins which on hydrolysis gives lactic acid (CH3CHOHCOOH). Therefore, compound 'A' is [DELHI PMT 2010] |
A. | formaldehyde |
B. | acetaldehyde |
C. | acetone |
D. | benzaldehyde |
Answer» C. acetone | |
21. |
Which of the following statements is not correct? [DELHI PMT 2010] |
A. | Aldehydes and ketones undergo nucleophilic addition |
B. | Aldehydes and ketones undergo electrophilic substitution |
C. | Aldehydes and ketones contain polar carbonyl group |
D. | Lower members of aldehydes and ketones are soluble in water due to hydrogen bonding |
Answer» C. Aldehydes and ketones contain polar carbonyl group | |
22. |
Clemmensen reduction of a ketone is carried out in the presence of which of the following? [CBSE AIPMT 2011] |
A. | H2 and Pt as catalyst |
B. | Glycol with KOH |
C. | Zn-Hg with HCl |
D. | LiAlH4 |
Answer» D. LiAlH4 | |
23. |
Presence of carbonyl group (C=O) will reflect precipitate of color |
A. | red |
B. | orange |
C. | brown |
D. | white |
Answer» C. brown | |
24. |
Solution which contain copper(II) ions (Cu+2) is |
A. | alkaline |
B. | Fehling solution |
C. | acidic solution |
D. | both A and B |
Answer» E. | |
25. |
An aqueous solution of silver nitrate in excess ammonia called |
A. | ammoniacal silver nitrate solution |
B. | Tollens reagent |
C. | Fehlings solution |
D. | both A and B |
Answer» E. | |
26. |
In order to identify precipitates which are obtained can be matched with respecting |
A. | melting point data |
B. | electronegativity |
C. | polarity |
D. | masses |
Answer» B. electronegativity | |
27. |
Primary alcohol is gently heated to produce aldehyde in presence of solution of acidified |
A. | hydroxide |
B. | dichromate |
C. | ethanol |
D. | all of them |
Answer» C. ethanol | |
28. |
HCN undergoes Nucleophilic addition reaction to give product of |
A. | hydrogen cyanide |
B. | hydroxynitrile |
C. | hydroxyl amine |
D. | all of them |
Answer» C. hydroxyl amine | |
29. |
Secondary alcohol forms ketone and water by reacting with |
A. | oxygen atom |
B. | oxygen molecule |
C. | ozone molecule |
D. | oxygen ion |
Answer» B. oxygen molecule | |
30. |
Carbonyl compounds are |
A. | aldehydes |
B. | ketones |
C. | both A and B |
D. | alcohols |
Answer» D. alcohols | |
31. |
In redox reaction, Ag+ ions are theirself |
A. | oxidized |
B. | reduced |
C. | stable |
D. | stable |
Answer» C. stable | |
32. |
Reducing agent used for reduction of aldehydes and ketone is |
A. | tetrafluorate |
B. | tetrahydridoborate |
C. | tetrafluroborate |
D. | tetrachloride |
Answer» C. tetrafluroborate | |
33. |
Almond essence in cakes and pudding is made from |
A. | ester |
B. | alcohol |
C. | benzaldehyde |
D. | ketone |
Answer» D. ketone | |
34. |
Solution which is used to detect presence of aldehyde or ketone is |
A. | 2,4-dinitrophenylhydrazine |
B. | BNPH |
C. | both A and B |
D. | tollens reagent |
Answer» D. tollens reagent | |
35. |
Carbonyl compounds when oxidized easily to form carboxylic group involves |
A. | aldehydes |
B. | ketones |
C. | haloalkanes |
D. | esters |
Answer» B. ketones | |
36. |
Carbonyl compounds have an odor similar to |
A. | almonds |
B. | grapes |
C. | fruits |
D. | blue cheese |
Answer» B. grapes | |
37. |
Ketones are formed by oxidation of |
A. | primary alcohols |
B. | secondary alcohol |
C. | tertiary alcohol |
D. | amines |
Answer» C. tertiary alcohol | |
38. |
Hydrogen Cyanide |
A. | is highly toxic |
B. | is colorless |
C. | have smell of almonds |
D. | all of them |
Answer» E. | |
39. |
Hydrogen react following addition reactions with |
A. | aldehydes |
B. | ketones |
C. | haloalkanes |
D. | both A and B |
Answer» E. | |
40. |
Silver ions Ag+ act as |
A. | reducing agent |
B. | oxidizing agent |
C. | catalyst |
D. | both A and B |
Answer» C. catalyst | |
41. |
In carbonyl group Oxygen atom has high electronegativity which make it |
A. | stable |
B. | non-polar |
C. | polarized |
D. | unstable |
Answer» D. unstable | |
42. |
Ketones react with reducing agent to make |
A. | primary alcohols |
B. | secondary alcohol |
C. | tertiary alcohol |
D. | all of them |
Answer» C. tertiary alcohol | |
43. |
Reduction reactions of carbonyl compounds is known to be |
A. | Nucleophilic addition |
B. | Nucleophilic substitution |
C. | addition reaction |
D. | elimination reaction |
Answer» B. Nucleophilic substitution | |
44. |
CH3CH2CH2CH2CHO is formula for |
A. | methanol |
B. | propanal |
C. | butanal |
D. | pentanal |
Answer» E. | |
45. |
If ketones are not oxidized, then upon heating Fehling's solution remains |
A. | white |
B. | blue |
C. | unchanged |
D. | both B and C |
Answer» E. | |
46. |
Chemical reaction between carbonyl compounds and DNPH is example of |
A. | condensation reaction |
B. | substitution reaction |
C. | addition reaction |
D. | elimination reaction |
Answer» B. substitution reaction | |
47. |
Oxidation of primary alcohols give |
A. | aldehydes |
B. | ketones |
C. | both A and B |
D. | alcohols |
Answer» B. ketones | |
48. |
During a reaction, formation of mirror inside tube is due to |
A. | silver ions |
B. | silver atoms |
C. | silver compounds |
D. | silver nitrate |
Answer» C. silver compounds | |
49. |
Carbonyl group in aldehyde is |
A. | C=O |
B. | C-O |
C. | CO |
D. | CHO |
Answer» B. C-O | |
50. |
Further addition of ethanol will lead to different product as |
A. | ethanoic acid |
B. | ketones |
C. | benzaldehyde |
D. | all of them |
Answer» B. ketones | |