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Q.

The variation of concentration of A with time in two experiments starting with two different initial concentration of A is given in the following graph. The reaction is represented as A (aqS)→ B (aqS). What is the rate of reaction (M/min) when concentration of A in aqueous solution was 1.8 M ?

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a

0.072M min-1

b

0.036Mmin-1

c

0.1296Mmin-1

d

1Mmin-1

answer is A.

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Detailed Solution

Rate law r=k[A]mr1=0.35M/ min from graph (exp.1)r2=0.25M/ min from graph (exp.2)r1r2=32=[A]1[ A]2m=1.51m⇒m=10.35=k(1.5)⇒k=125min-1r=k×[A]⇒125×1.8=0.072Mmin-1

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The variation of concentration of A with time in two experiments starting with two different initial concentration of A is given in the following graph. The reaction is represented as A (aqS)→ B (aqS). What is the rate of reaction (M/min) when concentration of A in aqueous solution was 1.8 M ?