NEET Chemistry Chemical Kinetics Questions Solved


In a Ist order reaction A  products, the concentration of the reactant decreases to 6.25% of its initial value in 80 minutes. What is (i) the rate constant and (ii) the rate of the reaction. 100 minutes after the starts, if the initial concentration is 0.2 mole/litre ?

(A)2.17 × 10-2 min-1, 3.47 × 10-4 mol. litre-1 min-1

(B) 3.465 × 10-2 min-1, 2.166 × 10-4 mol.litre-1 min-1

(C) 3.465 × 10-3min-1, 2.17 × 10-3 mol.litre-1 min-1

(D) 2.166 × 10-3 min-1, 2.667 × 10-4 mol.litre-1min-1

(B). (i) Given [A0] = 0.2 M & [A] = 0.2 ×6.25100 = 0.0125

K =2.303tlogA0A =2.30380log0.20.0125=0.0346min-1

Difficulty Level:

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