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Question

For a gaseous reaction, the rate is expressed interms of dPdt in place of dCdt or dndt, where C is concentration, n is number of moles and P ispressure of reactant. The three are related as:

A
[dPdt]=RTV[dndt]=[dCdt]
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B
1RT[dPdt]=1V[dndt]=[dCdt]
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C
[dPdt]= [dndt]=[dCdt]
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D
None of these
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Solution

The correct option is B 1RT[dPdt]=1V[dndt]=[dCdt]
Rate expression =dPdt
From ideal gas equation, P=nVRT
C=nV and C=PRT
dCdt=ddt(nV)=1V(dndt)
ddt(PRT)=1RT(dPdt)

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