MCQ
The valency of phosphorus in ${H_3}P{O_4}$ is
- A$2$
- ✓$5$
- C$4$
- D$1$
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Compound $(B)$ in above reaction is
$S{O_2} + \frac{1}{2}{O_2} \to S{O_3} + y\,kcal$
Find out the heat of formation of $S{O_2}$
$(A)$ $n =3,1=0, m =0$
$(B)$ $n =4, l =0, m =0$
$(C)$ $n =3, l =1, m =0$
$(D)$ $n =3, l =2, m =1$
The correct option for the order is :