Sodium salt of benzene sulphonic acid when fused with sodium cyanide gives __________. 

The high melting point and insolubility inorganic solvents of Sulphanilic acid are due to its _________ structure.

326. Nitromethane on reaction with nitrous acid gives _______.

Catalytic reduction of nitrobenzene with H₂—Pd—C gives _________.

__________ amines do not react with acetyl chloride.

Aliphatic ________ amines react with HNO₂ to form nitroso amines.

________ amines do not react with Grignard reagent.