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  • Which among the following will be the unit of rate constant for a homogeneous elementary reaction, A + B → COption: 1

Which among the following will be the unit of rate constant for a homogeneous elementary reaction, A + B → C

Option: 1

\mathrm{\mathrm{s}^{-1} }


Option: 2

\mathrm{s}^{-1} \mathrm{~mol} \mathrm{~L}^{-1}


Option: 3

\mathrm{s}^{-1} \mathrm{~mol}^{-1} \mathrm{~L}


Option: 4

\mathrm{s}^{-1} \mathrm{~mol}^2 \mathrm{~L}^{-2}


Answers (1)

best_answer

Order of a homogenous elementary reaction is the number of reacting molecules.

For A + B → C, order will be 2

Unit of Rate constant  \mathrm{K}=[\mathrm{conc} \text {. }]^{1-\text { order }} \mathrm{s}^{-1}
\Rightarrow \text { Unit of Rate constant } \mathrm{K}=\left[\mathrm{mol} \mathrm{L}^{-1} \right]^{-1} \mathrm{~s}^{-1}
\Rightarrow \text { Unit of Rate constant } \mathrm{K}=\mathrm{mol}^{-1} \mathrm{~L}^1 \mathrm{~s}^{-1}.

Posted by

Devendra Khairwa

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