Q 21 :    

The products A and B in the following reactions, respectively, are:              [2025]

$A\stackrel{\mathit{Ag}\mathit{-}{\mathit{NO}}_{\mathit{2}}}{\mathit{\to }}{\text{CH}}_3-{\text{CH}}_2-{\text{CH}}_2-\text{Br}\stackrel{\mathrm{AgCN}}{\to }B$

• ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2{\text{NO}}_2,{\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{CN}$

   

• ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{ONO},{\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{NC}$

   

• ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{ONO},{\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{CN}$

   

• ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2{\text{NO}}_2,{\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{NC}$

   

Q 22 :    

The product B formed in the following reaction sequence is:            [2025]

Q 23 :    

The major product of the following reaction is:                      [2025]

• 2-Phenylhepta-2,4-diene

   

• 6-Phenylhepta-2,4-diene

   

• 2-Phenylhepta-2,5-diene

   

• 6-Phenylhepta-3,5-diene

   

Q 24 :    

In the following substitution reaction:              [2025]

Product ‘P’ formed is:

Q 25 :    

Given below are two statements:                               [2025]

Statement (I): Alcohols are formed when alkyl chlorides are treated with aqueous potassium hydroxide by elimination reaction.

Statement (II): In alcoholic potassium hydroxide, alkyl chlorides form alkenes by abstracting the hydrogen from the $\mathrm{\beta }$-carbon.

In the light of the above statements, choose the most appropriate answer from the options given below:

• Both Statement I and Statement II are incorrect

   

• Statement I is incorrect but Statement II is correct

   

• Statement I is correct but Statement II is incorrect

   

• Both Statement I and Statement II are correct