MCQOPTIONS
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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. |
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» 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. |
Formalin is _______ % solution of formaldehyde in water |
| 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. |
Which of the following will have the highest boiling point? |
| 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 | |