Embibe Experts Solutions for Chapter: Equilibrium, Exercise 1: JKCET 2017

There are two statements, one labelled as Assertion (A) and the other as Reason (R). Examine both the statements carefully and mark the correct choice.
$\left(\mathrm{A}\right)$ At equilibrium, the mass of each of the reactants and products remains constant.
$\left(\mathrm{R}\right)$ At equilibrium, the rate of forward reaction is equal to the rate of backward reaction.

Burning the coal is represented as ${\mathrm{C}}_{\left(\mathrm{s}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}⟶{\mathrm{CO}}_{2\left(\mathrm{g}\right)}.$
The rate of this reaction is increased by

For the reaction, $\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}={\mathrm{CO}}_2( \mathrm{g})+{\mathrm{H}}_2\left(g\right)$ at a given temperature the equilibrium amount of ${\mathrm{CO}}_2( \mathrm{g})$ can be increased by

The $\mathrm{pH}$ of pure water at $90{}^{\circ }\mathrm{C}$ will be

The hydroxyl ion concentration in a solution having $\mathrm{pH}$ value $3$ will be

${\mathrm{CH}}_3\mathrm{COOH}$ is $1\%$ ionised in its aqueous solution of $0.1\mathrm{M}$ strength. Its $\mathrm{pOH}$ will be

Ostwald's dilution law is applicable only for

What will be the $\mathrm{pH}$ at which precipitation of $\mathrm{Zn}(\mathrm{OH}{)}_2$ will take place from a solution containing $0.3\mathrm{M} {\mathrm{Zn}}^{2+}$ion? ${\mathrm{K}}_{\mathrm{sp}}$ of $\mathrm{Zn}(\mathrm{OH}{)}_2=1.2\times {10}^{-12}$