1.

Which of the following curves represents a first order reaction.A. B. C. D. All of these

Answer» Correct Answer - D
A first order reaction exhibits an exponential decay of the reaction concentration `[R_(t)=R_(0)e^(Kt)]` and a linear decay of the logarithm of the reactant concentration `[logR_(1)=logR_(0)-(k)/(2.303).t]` Integrated rate law for a first order reaction is
`K=(2.303)/tlog(([R]_(0))/([R]_(t)))`
or `log({:(([R]_(0))/([R]_(t)),=,((K)/(2.303)),t),(overset(uarr,)(y),=,overset(uarr)(m),overset(uarr)(x)):})`


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