A first order reaction is 50% completed in 1.26 × 1014 s. How much time would it take for 100% completion?
A. 1.26 × 1015 s
B. 2.52 × 1014 s
C. 2.52 × 1028 s
Given, t1/2=1.261014 we know the reaction is a first order
t1/2=.693/k ……..for first-order reaction
using above given value we can find k
For 100% completion
At 100% completion R=0 so
Thus Option (iv) is correct.
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Note: In the following questions match the items of Column I with appropriate item given in Column II.
Match the graph given in Column I with the order of reaction given in Column II. More than one item in Column I may link to the same item of Column II.
Column I Column II
(ii) (a) first order
(iii) (b) zero order
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