Which of the following is not correctly matched ?

Options

A. `Ni^(2+)-` Red precipitate with `DMG `and ammonia solution
B. `Zn^(2+)-` While precipitate with `H_(2)S` gas in presence of `NH_(4)OH` and `NH_(4)Cl`
C. `Al^(3+)-` Infusible green mass is obtained in cobalt nitrate test.
D. `Pb^(2+)-` Yellow precipitate with both `KI` and `K_(2)CrO_(4)` reagents.

Answer

3

Explanation

`Al_(2)O_(3)+CoOoverset(Delta)rarrAl_(2)O_(3).CoO(` blue mass `). ZnO.CoO` is green in colour.