MCQ
Ionization energy increases in the order
- A$Be,\,B,\,C,\,N$
- ✓$B,\,Be,\,C,\,N$
- C$C,\,N,\,Be,\,B$
- D$N,\,C,\,Be,\,B$
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| $p ( mm Hg )$ | $50$ | $100$ | $200$ | $400$ |
| Relative $t _{1 / 2}( s )$ | $4$ | $2$ | $1$ | $0.5$ |
The order of the reaction is