MCQ
A black sulphide ppt when treated with ozone becomes white, the white compound is
- A$ZnSO_4$
- B$CaSO_4$
- C$BaSO_4$
- ✓$PbSO_4$
Few examples of multiple bonding are $C = C , C = O , N = C$
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$(a)$ $K_2PtCl_6$ $(b)$ $PtCl_4 . 2NH_3$
$(c)$ $PtCl_4 . 3NH_3$ $(d)$ $PtCl_4 . 5NH_3$
Their electrical conductances in aqueous solutions are

