Decompsition of H(2)O(2) follows a frist...

Decompsition of `H_(2)O_(2)` follows a frist order reactions. In 50 min the concentrations of `H_(2)O_(2)` decreases from 0.5 to 0.125 M in one such decomposition . When the concentration of `H_(2)O_(2)` reaches 0.05 M, the rate of fromation of `O_(2)` will be

A

`6.93xx10^(-2) M min ^(-1)`

B

`6.93 xx10^(-4) M min ^(-1)`

C

`2.66 L min ^(-1) at STP`

D

`1.34xx10^(-2) M min ^(-1)`

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The correct Answer is:

B

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