Chemistry NCERT Exemplar Solutions Class 12th Chapter Thirteen

This is a Short Type Questions as classified in NCERT Exemplar

This is a Short Type Questions as classified in NCERT Exemplar

This is a Short Type Questions as classified in NCERT Exemplar

Ans: On reaction with hydrochloric acid, aniline forms anilinium chloride ion which is water soluble. Therefore, the aniline solubility in aqueous HCl solution. 

This is a Short Type Questions as classified in NCERT Exemplar

Ans: Carbylamine reaction is shown by primary amines only, primary amines react with chloroform in the presence of alcoholic KOH to form isocyanides which upon catalytic reduction gives secondary amines as the final product. 

This is a Short Type Questions as classified in NCERT Exemplar

Ans: Z is an aliphatic amine that produces a solid that is insoluble in base. This means that the reaction with C₆H₅SO₂Cl must produce a product with no replaceable hydrogen attached to nitrogen.

To put it another way, the amine must be a secondary amine.

Z stands for ethylmethylamine.

This is a Short Type Questions as classified in NCERT Exemplar

Ans: N, N-dimethylbenzenanmine 

This is a Short Type Questions as classified in NCERT Exemplar

Ans:

This is a Short Type Questions as classified in NCERT Exemplar

Ans:  CH₃CH₂CH₃ < CH₃CH₂NH₂ < CH₃CH₂OH

As oxygen is more electronegative than nitrogen therefore, the O-H bond is more polar than the N-H bond. So ethanol has more dipole moments than ethylamine. Propane is non- polar in nature hence, had the least among all. 

This is a Short Type Questions as classified in NCERT Exemplar

Ans: CS₂ is a non-polar solvent which decreases the activating effect of? NH₂. As a result, mono substitution occurs only at o- and p- positions giving a mixture of 2-bromoaniline (minor) and 4-bromoaniline (major) as products. 

This is a Short Type Questions as classified in NCERT Exemplar

Ans: The azo products have an extended conjugate system with both aromatic rings linked by the –N=N- bond. These compounds are frequently colored and used as dyes. Benzene diazonium chloride reacts with phenol to form p-hydroxy azobenzene by coupling the phenol molecule in its para position with the diazonium salt. This is referred to as a coupling reaction.