MCQ
The correct order of ionisation energy for comparing carbon, nitrogen and oxygen atoms is
- A$C > N > O$
- B$C > N < O$
- ✓$C < N > O$
- D$C < N < O$
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$(A)$ $(\gamma, n)$ $(B)$ $(p, D)$ $(C)$ $(n, D)$ $(D)$ $(\gamma, p)$
$\frac{1}{2}{P_4}(s) + 3C{l_2}(g) \to 2PC{l_3}(l)\,;$ $\Delta H=-635 \,kJ$
$PC{l_3}(l) + C{l_2}(g) \to PC{l_5}(s)\,;$ $\Delta H=-137\, kJ$
The value of heat of formation of $PCl_5$ is ......$kJ\,mol^{-1}$