1.

Quantium efficiency or quantum yield (phi) of photochemical reaction is given by: phi = ("moles of the substance reacted")/("moles of photons absorbed") Absorption of UV radiation decomposes A according to the reaction 2A overset (hv) rarr B+3C In a first order reaction 75% of the reactant disappears in 1.386 h the rate constant of the reaction is close to:

Answer»

`7.2xx10^(-1) s^(-1)`
`3.6xx10^(-3) s^(-1)`
`1.8xx10^(-3) s^(-1)`
`2.8xx10^(-4) s^(-1)`

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