JEE Advanced Model Paper 17 with solutions for online practice

Question : 33 of 60

Marks: +1, -0

Find out total number of cation(s), which produce soluble compound with excess of KCNsolution Pb2+ (aq) , Hg2+ (aq) , Cr3+ (aq) , Cu2+ (aq) , Au+ (aq) , Co2+ (aq) , Cd2+ (aq) , Zn2+ (aq) , Ni2+ (aq)