For the reaction, $2\mathrm{NO}\left(\mathrm{g}\right) \rightleftharpoons {\mathrm{N}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$; $\mathrm{\Delta H}=-\mathrm{ve}$; $\mathrm{K}=2.5\times {10}^{20}$ at $298 \mathrm{K}$. What will happen to concentration of ${\mathrm{N}}_2$ temperature is decreased to $273 \mathrm{K}$?

For the reaction, $2\mathrm{NO}\left(\mathrm{g}\right) \rightleftharpoons {\mathrm{N}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$; $\mathrm{\Delta H}=-\mathrm{ve}$; $\mathrm{K}=2.5\times {10}^{20}$ at $298 \mathrm{K}$. What will happen to concentration of ${\mathrm{N}}_2$ if pressure is reduced also explain your answer?

Hydrolysis of sucrose give

$\mathrm{Sucrose}+{\mathrm{H}}_2\mathrm{O}\rightleftharpoons \mathrm{Glucose}+\mathrm{Fructose}$

Equilibrium constant ${\mathrm{K}}_{\mathrm{c}}$ for the reaction is $2\times {10}^{13}$ at $300 \mathrm{K}$. Calculate $∆\mathrm{G}°$ at $300 \mathrm{K}$.

$(\log 2=0.3010)$ 

The concentration of hydrogen in two samples of soft drinks A and B are $4.0 \times {10}^{-7}$ and $3.2 \times {10}^{-6}$ respectively. Which of these two soft drinks has higher pH?

$50 \mathrm{mL} 0.04 \mathrm{M}$ calcium nitrate solution is added to $150 \mathrm{mL}$ of $0.08 \mathrm{M}$ ammonium sulphate. Will a precipitate of calcium sulphate form or not?

${\mathrm{K}}_{\mathrm{sp}} =0.4\times {10}^{-5}$