1.

A first orde reaction is 75% completed after 32min. When was 50% of the reaction completed?A. 16 minutesB. 8 minutesC. 4 minutesD. 32 minutes

Answer» Correct Answer - A
75 % completed in 32 minutes I .e., 2 half - life has passed
`therefore ` 1 half - life = 16 minutes


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