Seema Saini Solutions for Chapter: Chemical Equilibrium, Exercise 1: DPP 6.1

For the reaction $\mathrm{R}\rightleftharpoons \mathrm{P}$, variation of concentration is plotted against time. The time at which the equilibrium establishes is as shown:

Which of the following regions show(s) equilibrium?

An aquatic species needs at least $4 \mathrm{mg} {\mathrm{L}}^{-1}$ of ${\mathrm{O}}_2$ for their survival. The solubility of ${\mathrm{O}}_2$ in the water at $273 \mathrm{K}$ and $1 \mathrm{atm}$ pressure is $2.21\times {10}^{-3} \mathrm{mol} {\mathrm{L}}^{-1}$. The partial pressure of ${\mathrm{O}}_2$ above water (in the atmosphere at $273 \mathrm{K}$) needed for the survival of species is:

In a reversible reaction $\mathrm{A}\rightleftharpoons \mathrm{B}$, the initial concentration of $\mathrm{A}$ and $\mathrm{B}$ are $\mathrm{a}$ and $\mathrm{b}$, respectively, in moles per litre and the equilibrium concentration are $\left(\mathrm{a}-\mathrm{x}\right)$ and $\left(\mathrm{b}+\mathrm{x}\right)$, respectively. Express $\mathrm{x}$ in terms of ${\mathrm{k}}_1, {\mathrm{k}}_2, \mathrm{a}$ and $\mathrm{b}$.

At a particular temperature and atmospheric pressure, the solid and liquid phases of a pure substance can exist in equilibrium. Which of the following term defines the temperature?

Select the correct statements.

Which are heterogeneous system?

Select the correct statements:

${\mathrm{PCl}}_5\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_3\left(\mathrm{g}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)$
Which of the following sketches may represent the above equilibrium? Assume equilibrium can be achieved from either side and by taking anyone or more components initially.(Given ${\mathrm{K}}_{\mathrm{C}}$ for the reaction$<2$ ).