Calculate the volume occupied by a particle in simple cubic unit cell if the total volume of unit cell is $4.0 \times 10^{-23} \mathrm{~cm}^3$.
$1.5 \times 10^{-23} \mathrm{~cm}^3$
$2.9 \times 10^{-23} \mathrm{~cm}^3$
$2.1 \times 10^{-23} \mathrm{~cm}^3$
$3.7 \times 10^{-23} \mathrm{~cm}^3$
Which of the following gas has high percentage by volume in air?
$\quad \mathrm{O}_2$
$\mathrm{N}_2$
$\quad \mathrm{CO}_2$
Ar
The rate law for the reaction, $x \mathrm{~A}+y \mathrm{~B} \longrightarrow \mathrm{mP}+\mathrm{nQ}$, is $\mathrm{r}=\mathrm{k}[\mathrm{A}]^{\mathrm{c}} \times[\mathrm{B}]^{\mathrm{d}}$ What is the overall order of reaction?
$(x+y)$
$(m+n)$
$(\mathrm{c}+\mathrm{d})$
$\frac{x}{y}$
Calculate the molal elevation constant of water if boiling point of 0.7 m solution of non volatile solute is 373.5 K .
[Boiling point of water $=373.15 \mathrm{~K}$ ]
$0.4 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$
$0.25 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$
$0.5 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$
$0.60 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$
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