Q42 of 54 Page 92

Match the following graphical variation with their description

A B


(i)


(a) Variation in product concentration with time


(ii)


(b) Reaction at Equilibrium


(iii)


(c) Variation in reactant concentration with time




• Le chatlier principle: If a system at Equilibrium experiences a change in any factor that determines the Equilibrium then the Equilibrium tends to shifts in a manner as to counteract the imposed change in the Equilibrium


Explanation: According to Le chatlier principle as the time passes accumulation of products occur and depletion of reactant i.e. reaction will proceed in the forward direction.




Explanation: According to Le chatlier principle as time passes accumulation of reactant occurs and depletion of product i.e. the reaction will proceed in the backward direction.




Explanation: According to Le chatlier principle as time passes equal attainment of reactant and product occurs and chemical Equilibrium is obtained. It can be obtained from either direction.


More from this chapter

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40

Match standard free energy of the reaction with the corresponding Equilibrium constant

 41

Match the following species with the corresponding conjugate acid

Species Conjugate acid



 43

Match Column (I) with Column (II)

Column I Column II


(i) Equilibrium (a) ∆G > 0, K < 1


(ii) Spontaneous reaction (b) ∆G = 0


(iii) Non spontaneous reaction (c) ∆G⊖ = 0


(d) ∆G < 0, K >1


 44

Note: In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Increasing order of acidity of hydrogen halides is HF < HCl < HBr < HI


Reason (R): While comparing acids formed by the elements belonging to the same group of periodic table, H–A bond strength is a more important factor in determining acidity of an acid than the polar nature of the bond.