Free Aldehydes and Ketones MCQs with Answers

• A. Aldehyde
• B. Ketone
• C. Alcohol
• D. Ether

Explanation: In Ketone carbon atom decreased because a carboxylic acid is also formed when Oxidation occurOxidation of Ketones:Ketones do not undergo…

• A. Aniline
• B. Hydrazine
• C. Phenyl hydrazine
• D. Picric acid

Explanation: Picric acid is derived from alcohol not NH3

• A. Aldehyde group
• B. Hydroxyl group
• C. Carboxylic group
• D. Both (a) and (b)

Explanation: Aldehydes and ketones possessing a-hydrogen atoms react with a cold dilute solution of an alkali to form addition products known as…

• A. C3H8
• B. CH2O
• C. C3H7OH
• D. CH3COCH3

Explanation: A powerful reducing agent is one that easily gets oxidized. Formaldehyde will easily get oxidized as the carbonyl carbon is more favorable…

• A. Formaldehyde
• B. Acetaldehyde
• C. Benzaldehyde
• D. Trichloro acetaldehyde

Explanation: As acetaldehyde has alpha hydrogen, it gives aldol condensation, not Cannizzaro reaction.

• A. O || CH3 - C- H
• B. O || CH3 - C- CH3
• C. O || CH3 - C- OH
• D. O || CH3 - C- CH2 - CH

Explanation: Benedict's Solution Test |an alkaline solution containing a cupriccitrate complex ion]: Aliphatic aldehydes form a brick-red…

• A. Acetaldehyde
• B. Acetone
• C. 2-pentanone
• D. 3-pentanone

Explanation: The haloform reaction using iodine and aqueous sodium hydroxide is called the iodoform test.

• A. Alkanes
• B. Alkenes
• C. Ethers
• D. Alcohols

Explanation: Among the carbonyl compounds, ketones have slightly higher boiling points than the isomeric aldehydes.

• A. sp
• B. sp2
• C. sp3
• D. dsp2

Explanation: Organic compounds containing the carbonyl functional group,are called carbonyl compounds.

• A. Free radical
• B. Nucleophilic substituion
• C. Nucleophilic addition
• D. Electrophilic addition

Explanation: As HCN is a nucleophile, it is added in a nucleophilic addition reaction.

• A. Ag
• B. CuO
• C. Cu2O
• D. AgBr

Explanation: Cu2O is the red brown pptFehling's Solution Test [an alkaline solution containing a cuprictartrate complex ion]: Aliphatic aldehydes form…

• A. Hydrazone
• B. Oxime
• C. Cyanohydrin
• D. Bisulphite addition product

Explanation: Reaction with HydroxylamineAldehydes and ketones react with hydroxylamine to form oximes in thepresence of an acid.

• A. HCHO
• B. CH3CHO
• C. CH3COCH3
• D. CH3CH2CH2OH

Explanation: Paraldehyde is polymer of acetaldehydeUses of Acetaldehyde1. It is used in the production of acetic acid, acetic anhydride, n-butanol…

• A. Medicine
• B. Poison
• C. Dye
• D. Polymer

Explanation: Uses of Acetaldehyde1. It is used in the production of acetic acid, acetic anhydride, n-butanol, ethanol,2-ethyl-1-hexanol, vinyl acetate…

• A. HCHO
• B. CH3CHO
• C. CH3COCH3
• D. CH3COOH

Explanation: Calcium formate on dry distillation gives Formaldehyde.

• A. Alkane
• B. Acetal
• C. Carboxylic acid
• D. Ketones

Explanation: Aldehydes combine with alcohols in the presence of hydrogen chloride gas to form acetals. The hydrogen chloride gas acts as a catalyst.

• A. 2, 4 DNPH test
• B. NaHSO3 test
• C. Tollen's test
• D. Sodium nitroprusside test

Explanation: Sodium Nitroprusside Test:Ketones produce a wine red or orange red colour on adding alkalinesodium nitroprusside solution dropwise.

• A. P alcohol
• B. S alcohol
• C. T alcohol
• D. None

Explanation: Ketone upon reduction produce secondary alcoholReduction of a ketone leads to a secondary alcohol.

• A. Self oxidation reduction
• B. Concentrated NaOH
• C. Disproportionation reaction
• D. Dilute NaOH

Explanation: Cannizzaro reaction is a chemical reaction named after Stanislao Cannizzaro that involves the base-induced disproportionation of two…

• A. Cooling
• B. Heating
• C. Boiling
• D. Do not give ppt.

Explanation: Aldehyde gives ppt by boilingFehling's Solution Test [an alkaline solution containing a cuprictartrate complex ion]: Aliphatic aldehydes…