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Consider the following equilibria:

\mathrm{(i) \ H_2(g) + I_2(g) \rightleftharpoons 2HI(g)}

\mathrm{(ii) \ N_2(g) + O_2(g) \rightleftharpoons 2NO(g)}

\mathrm{(iii) \ CO(g) + Cl_2(g) \rightleftharpoons COCl_2(g)}

\mathrm{(iv) \ N_2(g) + 3 H_2(g) \rightleftharpoons NH_3(g)}

In which of the following, there is no effect of changing the pressure on equilibrium?

Option: 1

\mathrm{(i)\ and\ (ii)}


Option: 2

\mathrm{(ii)\ and\ (iii)}


Option: 3

\mathrm{(i)\ and\ (iii)}


Option: 4

\mathrm{(ii)\ and\ (iv)}


Answers (1)

As we learnt,

On increasing the pressure, system moves in that direction in which there is lesser number of gaseous moles.

Thus, in cases where the change in gaseous moles is Zero, increasing or decreasing the pressure has no effect on equilibrium

Hence, the correct answer is Option (1)

Posted by

Ramraj Saini

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