MCQ
Which of the following elements does not form stable diatomic molecules
- AIodine
- ✓Phosphorus
- CNitrogen
- DOxygen
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$2 \mathrm{H}_{(\mathrm{aq})}^{+}+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_2(\mathrm{~g})$
${\left[\mathrm{H}^{+}\right]=1 \mathrm{M}, \mathrm{P}_{\mathrm{H}_2}=2 \mathrm{~atm}}$
(Given: $2.303 \mathrm{RT} / \mathrm{F}=0.06 \mathrm{~V}, \log 2=0.3$ )
| Column I | Column II |
| (a) Molarity | (1) $\frac{\text { Mass of solute }}{\text { Mass of solution }} \times 10^6$ |
| (b) Molality | (2) Number of gram moles of a solute per litre of solution |
| (c)Normality | (3) Number of gram moles of a solute per kg of solvent |
| (d) ppm | iv) Number of gram equivalent of a solute per litre of solution |