1.

Find out time period of 1st order reaction. When reaction complete 2/3 rd. If the value of rate constant is 4.3 × 10–4 (1) 0.0025 × 103 sec (2) 0.25 × 103 sec (3) 0.025 × 103 sec(4) 2.5 × 103 sec

Answer»

Correct option (4) 2.5 × 103 sec

Explanation:

R →P

a - x x = 2/3a

a - 2/3a = 1/3a

t = 2.3/(4.3 x 10-4) loga/a/3

= 2.5 x 10+3



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