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An important parameter of a photochemica...

An important parameter of a photochemical reaction is the quantum effeiciency or quantum yield `(phi)` which is defined as
`phi=("moles of the substance reaction")/("moles of photons absorbed")`
Absorption of UV radiation decompose acetone according to the reaction
`(CH_(3))_(2)COoverset(hv)(rarr)C_(2)H_(6)+CO`
The quantum yield of a reaction at `lambda=330nm` is 0.4 . A sample of acetone absorbs monochromatic radiation at `lambda330mn` at the rate of `7.2xx10^(-3)Js^(-1)` (given : `N_(A)=6xx10^(23), h=6.6xx10^(-34)` in S.I unit). The rate of formation of `CO(mol//s)` is :

A

`2xx10^(-8)`

B

`8xx10^(-8)`

C

`8xx10^(-9)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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An important parameter of a photochemical reaction is the quantum effeiciency or quantum yield (phi) which is defined as phi=("moles of the substance reaction")/("moles of photons absorbed") Absorption of UV radiation decompose acetone according to the reaction (CH_(3))_(2)COoverset(hv)(rarr)C_(2)H_(6)+CO If quantum yield in 0.8 then rate of formation of C_(2)H_(6)(mol//s) is :

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