Question 1

Aromatic aldehydes reduce&#8230;&#8230;&#8230;&#8230;&#10;A)Tollen's reagent&#10;B)Benedict's reagent&#10;C)Fehling reagent&#10;D)All of above

Accepted Answer

Aromatic aldehydes reduce Tollen's reagent, which is a solution of silver nitrate in ammonia, leading to the formation of a silver mirror on the reaction vessel. This is a classic test for aldehydes. Benedict's and Fehling's reagents are used to detect reducing sugars and do not react specifically with aromatic aldehydes.

Question 2

Cross Cannizzaro reaction is given by……….. A)C₆H₅CHO B)C₆H₅CHO. C)CH₃CHO D)All of above

Accepted Answer

C₆H₅CHO

Question 3

The product formed in aldol condensation is&#8230;&#8230;&#8230;&#8230;&#8230;.&#10;A)Beta hydroxy acid&#10;B)Beta hydroxy aldehyde or ketone&#10;C)Alpha, beta unsaturated ester&#10;D)Alpha, hydroxy aldehyde or ketone

Accepted Answer

In aldol condensation, the product formed is a beta-hydroxy aldehyde or ketone, resulting from the reaction between an aldehyde or ketone and a base.

Question 4

In which type of reaction cyanohydrin formed from acetone?&#10;A)Nucleophilic substitution&#10;B)Electrophilic substitution&#10;C)Nucleophilic addition&#10;D)Electrophilic addition

Accepted Answer

Cyanohydrin formation from acetone is a nucleophilic addition reaction, where a cyanide ion acts as the nucleophile and adds to the carbonyl carbon of acetone.

Question 5

Which of the following react with water? A)ClCH₂CH₂Cl B)Cl₃CCHO C)CCl₄ D)All of above

Accepted Answer

Trichloroacetaldehyde (Cl3CCHO) reacts with water to form chloral hydrate. The other compounds do not react with water under normal conditions.

Question 6

What is carbonyl group?&#10;A)OH&#10;B)C=O&#10;C)C- O&#10;D)None of above

Accepted Answer

The carbonyl group consists of a carbon atom double-bonded to an oxygen atom (C=O).

Deck 12: Organic Chemistry Reactions