MCQ
Crystals of which pair are isomorphous
- A$ZnS{O_4},$ $SnS{O_4}$
- B$MgS{O_4},$ $CaS{O_4}$
- ✓$ZnS{O_4},$ $MgS{O_4}$
- D$PbS{O_4},$ $NiS{O_4}$
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(Given : Molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ Ethyl alcohol : $46$,
water : $18$)
$(A)$ Upon heating, $H _3 PO _3$ undergoes disproportionation reaction to produce $H _3 PO _4$ and $PH _3$.
$(B)$ While $H _3 PO _3$ can act as reducing agent, $H _3 PO _4$ cannot.
$(C)$ $H _3 PO _3$ is a monobasic acid.
$(D)$ The $H$ atom of $P - H$ bond in $H _3 PO _3$ is not ionizable in water.