Question

Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. The product of lead formed is a

(1) Tetraanionic complex with coordination number six 

(2) Neutral complex with coordination number four 

(3) Dianionic complex with coordination number six 

(4) Dianionic complex with coordination number four

Answer 1

(4) Dianionic complex with coordination number four

\(PbCrO_4 +NaOH (\text {hot excess})\rightarrow [Pb(OH_4)]^{-2} +Na_2CrO_4\)

Dianionic complex with coordination number four