1.

Which of the comparison Zn, Cd, Hg is/are incorrect? (I) ZnCl_(2) is ionic whereasCdCl_(2) and HgCl_(2) is covalent (II) Zn and Cd dissolves in dilute acid HCl liberating H_(2) but Hg cannot (III) Zn and cd forming with ppt. of Zn(OH)_(2) and Cd(OH)_(2) but Hg forms coloured ppt. of Hg(OH)_(2). (IV) All form A_(2)^(2+) type ion

Answer»

Only III
I, III, IV
I and III
All of these

Answer :B


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