The reaction, A→B follows first order kinetics. Initial concentration of ‘A’ is 32 M. Concentration of ‘A’ after 400 minutes will be (Half life period of the reaction =100 minutes)

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2 M

1 M

0.5 M

0.25 M

answer is A.

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Detailed Solution

Amount left,(a-x)=Initial amounta2n; n=number of half lives; n=400100=4; (a-x)=3224=2 M;

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