Chemistry - Chemical Equilibrium Question with Solution | TestHub
How many statements regarding following equilibrium is/are correct
2A(g)⇌ B(s) + 3C(g) + heat
(i) On increasing P at constant T, state of equilibrium shifts in backward direction.
(ii) On decreasing V at constant T, state of equilibrium shifts in backward direction.
(iii) On increasing T, state of equilibrium shifts in backward direction.
(iv) On addition of 10 gm of B(s), state of equilibrium shifts in backward direction.
(v) On increasing T, equilibrium constant of the reaction decreases.
(vi) On increasing V at constant T equilibrium constant of the reaction decreases.
(vii) On increasing P at constant T, equilibrium constant of the reaction decreases.
(viii) On adding 10 gm of B(s) at constant T, equilibrium constant of the reaction decreases.
Answer:
Solution:
According to Le Chatelier's principle:
; gaseous moles: LHS = 2, RHS = 3.
(i) Increasing P and (ii) decreasing V shift equilibrium backward → correct.
(iii) Increasing T shifts equilibrium backward (exothermic forward), and (v) K decreases with T → correct.
Adding B(s) does not affect equilibrium, and K changes only with temperature; hence (iv), (vi), (vii), (viii) are incorrect.
Correct statements = (i), (ii), (iii), (v) → 4.
