MCQ
Urea is preferred to ammonium sulphate as a nitrogeneous fertilizer because
- AIt is more soluble in water
- BIt is cheaper than ammonium sulphate
- CIt is quite stable
- ✓It does not cause acidity in the soil
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[Given : Molal depression constant and density of water are $1.86\, K\, kg\, mol^{-1}$ and $1\, g\, cm^{-3}$ respectively.]


$A \to {\text{Product ;}}\,\, - \frac{{d[A]}}{{dt}} = {k_1}{[A]^o}$
$B \to {\text{Product ;}}\,\, - \frac{{d[B]}}{{dt}} = {k_2}{[B]}$
Units of $k_1$ and $k_2$ are expressed in terms of molarity $(M)$ and time $(sec^{-1})$ as