Embibe Experts Solutions for Chapter: Equilibrium, Exercise 3: EXERCISE-II (Previous Year Questions)

The reaction,

$2 \mathrm{A}\left(\mathrm{g}\right)+\mathrm{B}\left(\mathrm{g}\right)\rightleftharpoons 3\mathrm{C}\left(\mathrm{g}\right)+\mathrm{D}\left(\mathrm{g}\right)$

is begun with the concentrations of $\mathrm{A}$ and $\mathrm{B}$ both at an initial value of $1.00 \mathrm{M}.$ When equilibrium is reached, the concentration of $\mathrm{D}$ is measured and found to be $0.25 \mathrm{M}.$ The value for the equilibrium constant for this reaction is given by the expression:

Which will not be precipitated after addition of ${\left({\mathrm{NH}}_4\right)}_2{\mathrm{CO}}_3$ in the presence of ${\mathrm{NH}}_4\mathrm{Cl}?$  

What will be the solubility product of ${\mathrm{AX}}_3$:-  

What is the pH of the resulting solution when equal volumes of $0.1 \mathrm{M} \mathrm{NaOH}$ and $0.01 \mathrm{M} \mathrm{HCl}$ are mixed? $[\log 0.45 = -0.35]$

The ${\mathrm{K}}_{\mathrm{sp}}$ for bismuth sulphide $\left({\mathrm{Bi}}_2{\mathrm{S}}_3\right)$ is $1.08\times {10}^{-73}$. The solubility of ${\mathrm{Bi}}_2{\mathrm{S}}_3$ in ${\mathrm{molL}}^{-1}$ at $298 \mathrm{K}$ is

Mixture of ester and $\mathrm{HCl}$ is titrated with $\mathrm{NaOH}$ using phenolphthalein as an acidic indicator at end point pink colour disappear after some time due to:

Find concentration of $\left[{\mathrm{H}}^{+}\right]$ after mixing of $15 \mathrm{mL}$ $,0.1 \mathrm{M} {\mathrm{H}}_2{\mathrm{SO}}_4$ and $15 \mathrm{ml}$ $0.1 \mathrm{M} \mathrm{NaOH}$ :-   

$0.02 \mathrm{M}$ of pyridium hydrochloride having $\left[{\mathrm{H}}^{+}\right]$ is $3.6\times {10}^{-4}$. What is ionisation constant of pyridine?