MCQ
Ionic radii vary in:
- AInverse proportion to the effective nuclear charge.
- BInverse proportion to the square of effective nuclear charge.
- CDirect proportion to the screening effect.
- DDirect proportion to the square of screening effect.
Explanation:
$\text{Ionic radius}\propto\frac{1}{\text{eddective unclear charge}}$
Further, ionic radius increases as the screening effect increases
$\text{Ionic radius}\propto\text{screening effect}$
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| Column $I$ | Column $II$ |
| $(A)$ Freezing of water at $273 K$ and $1 \ atm$ | $(P)$ $q =0$ |
| $(B)$ Expansion of $1 \ mol$ of an ideal gas into a vacuum under isolated conditions | $(Q)$ $w=0$ |
| $(C)$ Mixing of equal volumes of two ideal gases at constant temperature and pressure in an isolated container | $(R)$ $\Delta S _{\text {sy5 }} < 0$ |
| $(D)$ Reversible heating of $H _2( g )$ at $1 \ atm$ from $300 \ K$ to $600 \ K$, followed by reversible cooling to $300 \ K$ at $1 \ atm$ | $(S)$ $\Delta U =0$ |
| $(T)$ $\Delta G =0$ |