HARDMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryChemical kineticsAchiever Section
The following data pertains to reaction between A and B : S. No. [A] mol L–1 [B] mol L–1 Rate (mol L–1 time–1) 1 1.0 × 10–2 2.0 × 10–2 2.0 × 10–4 2 2.0 × 10–2 2.0 × 10–2 4.0 × 10–4 3 2.0 × 10–2 4.0 × 10–2 8.0 × 10–4 Which of the following inference(s) can be drawn from the above data ? (i) Rate constant of the reaction is 1.0 × 10–4 . (ii) Rate law of the reaction is : rate = k[A][B] (iii) Rate of reaction increases four times on doubling the concentration of both the reactants. Select the correct answer using the codes given below :
A.(i), (ii) and (iii)
B.(i) and (ii)
C.(ii) and (iii)✓ Correct
D.(iii) only
Explanation
Rate law : x y d A k A B dt Doubling [A], rate is doubled. Hence 2x = 2, x =1 Similarly y = 1; d A k A B dt 4 2 2 rate 2.0 10 k 1 A B 1 10 2 10 x x xx 2 1 k 2 A 2 b rate 4 rate k A B
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