Assertion : Benzene on heating with cone. H₂SO₄ gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene.

Reason : Sulphonation is a reversible process.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

The reaction C₂H₅ONa + C₂H₅I $\to$ C₂H₅OC₂H₅ + Nal is known as :

• Kolbe's synthesis

• Wurtz's synthesis

• Williamson's synthesis

• Grignard's synthesis

Identify Z in the reaction.

Which of the following is an ester ?

• Coconut oil

• Kerosene oil

• Soap

• Glycerine

Toluene on treatment with CrO₃ and (CH₃CO)₂O followed by hydrolysis with dil. HCl gives

• benzaldehyde

• benzoic acid

• phenol

• phenylacetaldehyde.

1036.

Prolonged exposure of fat or oil in moist air and light causes bad smell (rancidity). It is due to

• formation of C₆ - C₁₂ fatty acids

• formation of ketone and aldehyde

• both of these causes

• formation of glycerol.

2 - pentanone and 3 - pentanone can be distinguished by :

• cannizaro's reaction

• iodoform reaction

• aldol condensation

• Clemmensen's reduction

Which will give cannizaro reaction ?

• Cl₃C-CHO

• C₆H₅CHO

• (CH₃)₃-C-CHO

• All of the above

CH₃CHI₂ $\stackrel{\mathrm{KCN}}{\to }$ $\stackrel{{\mathrm{H}}_2\mathrm{O} , ∆}{\to }$ ?

Here the end product would be :

• 2 - cyano propionic acid

• ethane - l , 1 - dicarboxylic acid

• 2 - methyl ethanoic acid

• propionic acid

Identify the product Y in the sequence :

CH₃CHO + CH₃MgI $\stackrel{\mathrm{Ether}}{\to }$ X $\stackrel{{\mathrm{H}}_2\mathrm{O}/{\mathrm{H}}^{+}}{\to }$ Y , is

• CH₃OH

• CH₃CH₂OH

• (CH₃)₂CHOH

• (CH₃)₃COH