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Supposing for the reaction : H(2)O(...

Supposing for the reaction :
`H_(2)O_(2)+ 2I^(-) + 2H^(+) to I_(2) + 2H_(2)O`
the concentration of hydrogen peroxide decreases from 0.10 mole/litre to 0.08 mole/litre in 20 minutes. The average rate of reaction will be

A

`10^(-3)"mol L"^(-1)S^(-1)`

B

`10^(-2)"mol L"^(-1)S^(-1)`

C

`10^(-1)"mol"L^(-1)S^(-1)`

D

`1.6xx10^(-5)"mol L"^(-1)S^(-1)`

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