The value of rate constant of a pseudo first order reaction ____________.

A. Depends on the concentration of reactants present in small amount

B. Depends on the concentration of reactants present in excess.

C. Is independent of the concentration of reactants.

D. Depends only on temperature. 

<p>This is a Fill in the blanks Type Question as classified in NCERT Exemplar</p><p><strong>Ans:</strong> Correct option C</p><p>Let's start with what a pseudo-first-order response is.</p><p>Although the pseudo-first-order reaction looks to be an order, it belongs to another order. It's a second-order reaction because it involves two reactants.</p><p>Let's have a look at a reaction.</p><p><strong>CH₃Br + OH→CH₃OH + Br^-&nbsp;</strong></p><p>So, the rate law for the reaction is</p><p><strong>Rate = k [OH] [CH₃Br]</strong></p><p><strong>Rate = k [OH^-&nbsp;] [CH₃Br]&nbsp;= k (constant) [CH₃Br]&nbsp;= K' [CH₃Br]</strong></p><p>Only the concentration of <strong>CH₃Br</strong> will change during the reaction, and the rate will be determined by the reaction's modifications.</p>

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