MCQ
Consider the following statements :-

$(i)$ Increase in concentration of reactant increases the rate of a zero order reaction

$(ii)$ Rate constant $k$ is equal to $'A'$ if $E_a = 0$

$(iii)$ Rate constant $k$ is equal to $'A'$ if $E_a = \infty$

$(iv)$ $log_e k$  vs  $T$ is a straight line

$(v)$ $log_ek$  vs   $1/T$ is straight line
Correct statement are

  • A
    $(i)$ and $(iv)$
  • $(ii)$ and $(v)$
  • C
    $(iii)$ and $(iv)$
  • D
    $(ii)$ and $(iii)$

Answer

Correct option: B.
$(ii)$ and $(v)$
b
${\text{k}} = {\text{A}} \times {{\text{e}}^{ - {{\text{E}}_a}/{\text{R}}T}}$

${\text{k}} = {\text{A}}$ (if ${{{\text{E}}_{\text{a}}} = 0}$ )

$\ln {\text{k}} = \ln {\text{A}} - \frac{{{{\text{E}}_{\text{a}}}}}{{{\text{RT}}}}$ ;

$\ln \,{\text{k}}\,{\text{Vs }}\frac{1}{{\text{T}}}\, = $ linear

$(ii)$ and $(v)$ $  \Rightarrow$ correct

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