Q 1 :

Acid D formed in above reaction is:                                   [2024]

• Malonic acid

   

• Oxalic acid

   

• Succinic acid

   

• Gluconic acid

   

Q 2 :

The total number of compounds from below when treated with hot ${\mathrm{KMnO}}_4$ giving benzoic acid is:           [2025]

• 3

   

• 5

   

• 4

   

• 6

   

Q 3 :

The major product ‘P’ formed in the given reaction is

                                             [2023]

Q 4 :

Grignard reagent RMgBr (P) reacts with water and forms a gas (Q). One gram of Q occupies 1.4 ${\mathrm{dm}}^3$ at STP. (P) on reaction with dry ice in dry ether followed by ${\mathrm{H}}_3{\mathrm{O}}^{+}$ forms a compound (Z). 0.1 mole of (Z) will weigh ______ g. (Nearest integer)                [2026]

Q 5 :

Incorrect statement is

• In carboxylic acids, the bonds to the carboxyl carbon lie in one plane and are separated by about $120°.$

   

• The carboxylic carbon is less electrophilic than carbonyl carbon because of the resonance in carboxylic acid.

   

• Aliphatic carboxylic acids upto nine carbon atoms are colorless liquids at room temperature with pleasant odours.

   

• Most carboxylic acids exist as dimer in the vapour phase.

   

Q 6 :

Assertion: p-hydroxybenzoic acid has a lower boiling point than o-hydroxybenzoic acid.

Reason: o-hydroxybenzoic acid has intramolecular hydrogen bonding.

• A is correct but R is not correct

   

• Both A and R are correct but R is not the correct explanation of A

   

• A is not correct but R is correct

   

• Both A and R are correct and R is the correct explanation of A