Which of the following reactions will get affected by increasing the pressure ? Also, mention whether change will cause the reaction to go into forward or backward direction. (i)COCl_(2(g)) hArr CO_((g)) +Cl_((2)(g)) (ii)CH_(4(g)) + 2S_(2(g)) hArr CS_(2(g)) + 2H_2S_((g)) (iii)CO_(2(g)) + C_((s)) hArr 2CO_((g)) (iv)2H_(2(g)) + CO_((g)) hArr CH_3OH_((g)) (v) CaCO_(3(s)) hArr CaO_((s)) + CO_(2(g)) (vi)4NH_(3(g)) + 5O_(2(g)) hArr 4NO_((g)) + 6H_2O_((g))

Which of the following reactions will get affected by increasing the p

1.	Which of the following reactions will get affected by increasing the pressure ? Also, mention whether change will cause the reaction to go into forward or backward direction. (i)COCl_(2(g)) hArr CO_((g)) +Cl_((2)(g)) (ii)CH_(4(g)) + 2S_(2(g)) hArr CS_(2(g)) + 2H_2S_((g)) (iii)CO_(2(g)) + C_((s)) hArr 2CO_((g)) (iv)2H_(2(g)) + CO_((g)) hArr CH_3OH_((g)) (v) CaCO_(3(s)) hArr CaO_((s)) + CO_(2(g)) (vi)4NH_(3(g)) + 5O_(2(g)) hArr 4NO_((g)) + 6H_2O_((g))
Answer» Solution :In CHEMICAL equilibrium the components in gases phase and `Deltan_((g)) ne 0`so, the effect of pressure on reaction. Only in reaction (ii) `Deltan_((g)) ne 0` and remaining reaction `Deltan ne 0`. So, effect of pressure does not occurs on reaction (ii) and remaining reaction (i), (iii), (iv), (v), (vi) the effect of pressure is occurs. According to increases in pressure, the forward reaction is (iv), REVERSE reactions are (i), (ii), (v) an (iv). Note: There is no effect of reaction (ii). Explain : On increasing pressure reaction moves in such direction moles of gases decreases and NEW equilibrium is established as per Le Chatelier.s PRINCIPLE. i.e. `Deltan_((g)) lt 0`in that direction reaction is forward.