MCQ
The compound that has the largest $H - M - H$ bond angle $( M = N , O , S , C ),$ is :
- A$H _{2} O$
- ✓$CH _{4}$
- C$NH _{3}$
- D$H _{2} S$

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| Column $-I$ | Column $-II$ |
| $(A)$ Ionisation potential | $(P)\; O < F < N$ |
| $(B)$ Electronegativity | $(Q)\; N < O < F$ |
| $(C) \;Z_{eff}$ | $(R) \;O < N < F$ |
| $(D)$ Electron affinity | $(S)\; N < C< O$ |
