MCQ
Heating white phosphorus with conc. $NaOH$ solution gives mainly
- A$Na _{3} P$ and $H _{2} O$
- B$H _{3} PO$ and $NaH$
- C$P ( OH )_{3}$ and $NaH _{2} PO _{4}$
- ✓$PH _{3}$ and $NaH _{2} PO _{2}$
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$Zn^{2+} + 2e^-$ $\longrightarrow$ $Zn (s) ; E^o = -0.76\,V$
$Ca^{2+} + 2e^-$ $\longrightarrow$ $Ca (s) ; E^o = -2.87\,V$
$Mg^{2+} + 2e^-$ $\longrightarrow$ $Mg (s) ; E^o = -2.36\,V$
$Ni^{2+} + 2e^-$ $\longrightarrow$ $Ni (s) ; E^o = -0.25\,V$
The reducing power of the metals increases in the order