JEE MAIN - Chemistry (2019 - 12th January Morning Slot - No. 8)
Decomposition of X exhibits a rate constant of 0.05 $$\mu $$g/year. How many year are required for the decomposition of 5$$\mu $$g of X into 2.5 $$\mu $$g?
50
20
25
40
Explanation
According to unit of rate constant it is a zero order
reaction, then half life of zero order reaction.
t1/2 = $${{{a_0}} \over {2k}} = {5 \over {2 \times 0.05}}$$ = 50 years
t1/2 = $${{{a_0}} \over {2k}} = {5 \over {2 \times 0.05}}$$ = 50 years
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