Equilibrium's Question 15 | Chemistry XI - Part 1 | NCERT Exemplar Questions

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MCQ (Single Correct Answer)

Which of the following options will be correct for the stage of half completion of the reaction $\mathrm{A} \rightleftharpoons \mathrm{B}$ ?

$\Delta G^{\ominus}=0$

$\Delta G^{\ominus}>0$

$\Delta \mathrm{G}^{\ominus}<0$

$\Delta G^{\ominus}=-R T \ln K$

MCQ (Single Correct Answer)

On increasing the pressure, in which direction will the gas phase reaction proceed to re-establish equilibrium, is predicted by applying the Le-Chatelier's principle. Consider the reaction,

$$\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{~g})$$

Which of the following is correct, if the total pressure at which the equilibrium is established, is increased without changing the temperature?

$K$ will remain same

$K$ will decrease

$K$ will increase

$K$ will increase initially and decrease when pressure is very high

MCQ (Single Correct Answer)

What will be the correct order of vapour pressure of water, acetone and ether at $30^{\circ} \mathrm{C}$ ? Given that among these compounds, water has maximum boiling point and ether has minimum boiling point?

Water < ether < acetone

Water < acetone < ether

Ether < acetone < water

Acetone < ether < water

MCQ (Single Correct Answer)

At 500 K , equilibrium constant, $\mathrm{K}_{\mathrm{c}}$, for the following reaction is 5.

$$\frac{1}{2} \mathrm{H}_2(\mathrm{~g})+\frac{1}{2} \mathrm{I}_2(\mathrm{~g}) \rightleftharpoons \mathrm{HI}(\mathrm{g})$$

What would be the equilibrium constant $\mathrm{K}_{\mathrm{c}}$ for the reaction?

$$2 \mathrm{HI}(\mathrm{g}) \rightleftharpoons \mathrm{H}_2(\mathrm{~g})+\mathrm{I}_2(\mathrm{~g})$$

0.04

0.4

2.5

MCQ (Single Correct Answer)

In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume?

$\mathrm{H}_2(\mathrm{g})+\mathrm{I}_2(\mathrm{g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})$

$\mathrm{PCl}_5(\mathrm{g}) \rightleftharpoons \mathrm{PCl}_3(\mathrm{g})+\mathrm{Cl}_2(\mathrm{g})$

$\mathrm{N}_2(\mathrm{g})+3 \mathrm{H}_2(\mathrm{g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{g})$

The equilibrium will remain unaffected in all the three cases

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