Graph of a reversible process;

is given. Analyse the graph and answer the following question.

Identify the part of the graph which represents the equilibrium state?

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

What is the total number of moles of reactants and products in the above reaction?

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

What is the effect of pressure in this reversible reaction? Explain.

If we show a red litmus paper over ammonia gas, it turns blue.

Which property of ammonia is shown here?

Graph of a reversible process,

is given. Analyse the graph and answer the following question.

From the given statements, select the correct ones regarding chemical equilibrium.

(i0 The chemical equilibrium is 'static' at the molecular level.

(ii) Both reactants and products co-exist.

(iii) The rates of forward reaction and backward reactions are equal.

(iv) Chemical equilibrium is attained in an open system.