JEE MAIN - Chemistry (2019 - 12th April Evening Slot - No. 1)
In which one of the following equilibria, Kp $$ \ne $$ KC ?
2NO(g) ⇋ N2(g) + O2(g)
2C(s) + O2(g) ⇋ 2CO(g)
2HI(g) ⇋ H2(g) + I2(g)
NO2(g) + SO2(g) ⇋ NO(g) + SO3(g)
Explanation
We know,
Kp = KC(RT)$$\Delta $$ng
Kp = KC when $$\Delta $$ng = 0
Kp $$ \ne $$ KC when $$\Delta $$ng $$ \ne $$ 0 and T $$ \ne $$ 12 K
In this reaction, 2C(s) + O2(g) ⇋ 2CO(g)
$$\Delta $$ng = 1, so Kp $$ \ne $$ KC
Kp = KC(RT)$$\Delta $$ng
Kp = KC when $$\Delta $$ng = 0
Kp $$ \ne $$ KC when $$\Delta $$ng $$ \ne $$ 0 and T $$ \ne $$ 12 K
In this reaction, 2C(s) + O2(g) ⇋ 2CO(g)
$$\Delta $$ng = 1, so Kp $$ \ne $$ KC
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