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Question

The rate constant for disappearance of reactant as mentioned in is 2×102molL1sec1, if the concentration of the reactant after 25 sec is 0.25M, the initial concentration is:
  1. 0.75 M
  2. 1.46 M
  3. 0.89 M
  4. 1.03 M

A
0.75 M
B
1.46 M
C
1.03 M
D
0.89 M
Solution
Verified by Toppr

From rate constant it can be seen that it is zero order reaction and ax=kt; a=x+kt =0.25+2×102×25=0.75 M.

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