MCQ
Sodium oxalate on heating with conc. ${H_2}S{O_4}$ gives
- A$CO$ only
- B$C{O_2}$ only
- ✓$CO$ and $C{O_2}$
- D$S{O_2}$ and $S{O_3}$
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$n = 4$______________
$n = 3$______________
$n = 2$ _____________
$n = 1$______________
$R - X + AgN{O_2} \to Q + AgX$
$P$ and $Q$ are related as
(At. no. : $Sc = 21, Ti = 22, Ni = 28,$$ Cu = 29, Co = 27$)
Element $-$ $IP$