Questions
For the first order reaction, XY the time taken for 87.5% completion of the reaction is 180 minutes. Time taken for 75% completion of the reaction will be ------ minutes
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a
120
b
60
c
150
d
108
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Correct option is A
t87.5%t50%=2.303K log 100100-87.52.303K log 100100-50; t87.5%t50%=3 log 2 log 2 t87.5%=3t50%; Conclusion : t99.9%=10t50%; t75%=2t50%; t87.5%=3t50%; t93.75%=4t50%; t 96.875%=5t50%;
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