Chemistry 1st Paper MCQ-Chittagong Board-2017

1. Used as preservative -

i. $\mathrm{CH}_{3} \mathrm{COOH}$

ii. BHA and BHT

iii. $\mathrm{CH}_{3} \mathrm{OH}$

Which one is correct?

2. 1 mole of $\mathrm{N}_{2} \mathrm{O}_{4}$ is heated in a closed vessel of volume of IL. At equilibrium, $\alpha$ moles are dissociated. The total pressure of the mixture is $\mathrm{P}$.

$\mathrm{N}_{2} \mathrm{O}_{4(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NO}_{2(\mathrm{~g})}$

The partial pressure of $\mathrm{NO}_{2}$ at equilibrium is -

3. Which one is the main constitutent of glass cleaner?

4. Which is the correct order of electronegativity for the elements given in the stem?

5. 1 mole of $\mathrm{N}_{2} \mathrm{O}_{4}$ is heated in a closed vessel of volume of IL. At equilibrium, $\alpha$ moles are dissociated. The total pressure of the mixture is $\mathrm{P}$.

$\mathrm{N}_{2} \mathrm{O}_{4(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NO}_{2(\mathrm{~g})}$

Which relationship is correct for the stem's reaction?

i. $K c=\frac{4 \alpha^{2}}{(1-\alpha) v}$

ii. $K p=\frac{4 \alpha^{2} P}{1-\alpha^{2}}$

iii. $K p=\frac{(1-\alpha) P}{\alpha}$