Sahana Ansari and Neha Miglani Solutions for Chapter: Equilibrium, Exercise 4: Chapter Practice

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 concentration of $\mathrm{NO}$ is increased? 

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?

Calculate degree of hydrolysis and $\mathrm{pH}$ of $0.25 \mathrm{M} \mathrm{NaCN}$ solution at $25°\mathrm{C}$. ${\mathrm{K}}_{\mathrm{a}} = 4.8\times {10}^{-10}$

What is common ion effect?

Define buffer solution. Give the application of buffer in daily life.

The value of ${\mathrm{K}}_{\mathrm{c}}$ in the reaction, $2\mathrm{A}\rightleftharpoons \mathrm{B}+\mathrm{C}$ is $2\times {10}^{-3}$. At a given time, the composition of reaction mixture is $\mathrm{A}=\mathrm{B}=\mathrm{C}=3\times {10}^{-4} \mathrm{M}$. In which direction the reaction will proceed?

The solubility product of ${\mathrm{PbBr}}_2$ is $10.8\times {10}^{-5}$. It is $70\%$ dissociated in saturated solution. Calculate the solubility of the salt.