MCQ
Lanthanide for which $+ II$ and $ + III $ oxidation states are common is
- ✓$La$
- B$Nd$
- C$Ce$
- D$Eu$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$Pt|H_2(P_1\ atm)\ | \ H^+(x_1M)\ ||\ H^+(x_2M)\ |\ H_2(P_2\ atm)\ |Pt$ .
The cell reaction will be spontaneous if
$(a)$ Heated : it is charred
$(b)$ $I_2$ solution : no violet colour
$(c)$ Fehling solution : reddish brown ppt. is observed
$(d)$ It does not reduce copper$(II)$ acetate to $Cu_2O$ . No red precipiated is observed in $5/ min$
The carboxylate which satisfy all the above observation
