For an endothermic reaction: 4A(g) + B 2 (g) ⇌ 2A 2 B(g) Match Column I with Column II (curves I, II, III show the concentrations of A, B 2 and A 2 B against time; the change is applied at the

Question

For an endothermic reaction: 4A(g) + B 2 ​ (g) ⇌ 2A 2 ​ B(g) Match Column I with Column II (curves I, II, III show the concentrations of A, B 2 ​ and A 2 ​ B against time; the change is applied at the marked instant) ​ Column I Column II P) i) Increase in temperature ​ Q) ii) Increase in pressure ​ R) iii) Addition of A 2 ​ B at equilibrium ​ S) iv) Addition of inert gas at constant pressure ​ v) Increase in volume ​

TestHub · Accepted Answer

The reaction is endothermic with Δ n g ​ = 2 - 5 = -3 Graph P: all concentrations drop suddenly, then the reactants rise and the product falls; this is dilution by added inert gas at constant pressure or by an increase in volume, P-iv and P-v Graph Q: the product jumps up suddenly while the reactants rise gradually; this is addition of A 2 ​ B at equilibrium, Q-iii Graph R: all concentrations jump up suddenly, then the reactants fall and the product rises; this is compression by an increase in pressure, R-ii Graph S: no sudden jump; the reactants fall gradually and the product rises, a forward shift; for an endothermic reaction this is an increase in temperature, S-i The correct mapping is option (d). ​

Chemistry - Chemical Equilibrium Question with Solution | TestHub

Options:

Doubts & Discussion

Column I	Column II
P)	$i) Increase in temperature$
Q)	$ii) Increase in pressure$
R)	$iii) Addition of A_{2} B at equilibrium$
S)	$iv) Addition of inert gas at constant pressure$
	$v) Increase in volume$