Question

The rate constant of a reaction depends on:
A )Temperature
B) Initial concentration of the reactants
C) Time of the reaction
D) Extent of reaction

Answer 1

Consider an equation which best represents any chemical reaction and that equation is nothing but we call it the arrhenius equation.
$k(T) = A{e^{ - \dfrac{{Ea}}{{RT}}}}$
Where $Ea$ is nothing but the activation energy. $R$ is the real gas constant, $T$ is the temperature and $Ae$ is the arrhenius constant.

Complete step-by-step answer: Firstly we will talk about the rate of a reaction
In chemical kinetics the reaction rate constant or the constant of a rate of a reaction is generally denoted by a coefficient or a greek symbol in common language. It may or may not be affected by some factors. Rate constant of a reaction basically depends upon the temperature and is not affected by its concentration.
Now we will further understand how it depends only on the concentration and not on any other factor.
Consider an equation which best represents any chemical reaction and that equation is nothing but we call it the arrhenius equation.
$k(T) = A{e^{ - \dfrac{{Ea}}{{RT}}}}$
Where $Ea$ is nothing but the activation energy. $R$ is the real gas constant, $T$ is the temperature and $Ae$ is the arrhenius constant.
Now, talking about what basically is the activation energy it is nothing but the minimum amount of energy required for any reaction to undergo a specified reaction.

Hence option A is correct which can easily be shown through the equation.

Note: When we talk about the reactions then we must think before applying any equation. If we are talking about the general reaction in chemical kinetics then we consider this equation which we called the arrhenius equation.