Question
$x =$ moles of anhydride consumed




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$2NH_3 + 5F_2\,\,\to \,\, N_2F_4 + 6HF$
(nearest integer)
[Given : Molar mass of $\mathrm{AB}_2=200 \mathrm{~g} \mathrm{~mol}^{-1} \cdot \mathrm{K}_{\mathrm{b}}$
(molal boiling point elevation const. of water)
$=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$, boiling point of water $=100^{\circ} \mathrm{C}$;
$\mathrm{AB}_2$ ionises as $\left.\mathrm{AB}_2 \rightarrow \mathrm{A}^{2+}+2 \mathrm{~B}^{-}\right]$
| $n$ | $l$ | $m_l$ | |
| $A$ | $3$ | $3$ | $-3$ |
| $B$ | $3$ | $2$ | $-2$ |
| $C$ | $2$ | $1$ | $+1$ |
| $D$ | $2$ | $2$ | $+2$ |
The number of correct sets of quantum numbers is ..... .