Question

Why amine shows color in any organic reaction at specific tempreture?

Answer 1

Answer:

Like ammonia, an amine can react with alkyl halide to form next higher class of ... Quarternary ammonium salts are useful in synthetic organic chemistry as ... This reaction is given only by primary amines.

Answer 2

$\mathfrak{\large{\underline{\underline{Answer :}}}}$

Different counterions impart lesser or greater stability of the aryldiazonium salt, to the point where certain counterions, such as tetrafluoroborate or acetate are stable at room temperature, so would be of lesser concern in the reaction.