A very dilute acidic solution of and gives only yellow ppt

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

A very dilute acidic solution of

\text{Cd}^{2+}

and

\text{Ni}^{2+}

gives only yellow ppt. of

\text{CdS}

on passing

\text{H}_2\text{S}

, this is due to : (1) Solubility product (

K_{sp}

) of

\text{CdS}

is more than that of

\text{NiS}

(2) Solubility product (

K_{sp}

) of

\text{CdS}

is less than that of

\text{NiS}

(3)

\text{Cd}^{2+}

belong to IIB group while

\text{Ni}^{2+}

belongs to IV^th group (4)

\text{CdS}

is insoluble in yellow ammonium sulphide (YAS)