741.

Benzene diazonium chloride on reaction with phenol in weakly basic medium gives

• diphenyl ether

• p-hydroxy azobenzene

• chlorobenzene

• benzene

Hinsberg's reagent is

• C₆H₅COCl

• CH₃COCl

• C₆H₅CH₂Cl

• C₆H₅SO₂Cl

Nessler's reagent is used to detect

• ${\mathrm{CrO}}_4^{2-}$

• ${\mathrm{PO}}_4^{3-}$

• ${\mathrm{MnO}}_4^{-}$

• ${\mathrm{NH}}_4^{+}$

The correct order of the basic strength of methyl substituted amines in aqueous solution is :

• (CH₃)₃N > CH₃NH₂ > (CH₃)₂NH

• (CH₃)₃N > (CH₃)₂NH> CH₃NH₂

• CH₃NH₂ > (CH₃)₂NH >(CH₃)₃N 

• (CH₃)₂NH> CH₃NH₂ > (CH₃)₃N