Which of the following statements is correct ?

Options

A. The rate of a reaction decrease with passage of time as the concentration of reactants decrease
B. The rate of a reaction is same at any time during the reactions
C. The rate of a reaction is indepent of temperature change
D. The rate of a reaction decreases with increase in concentration of
reactant(s).

Answer

A

Explanation

Rate of reactions is defined as rate of decrease of concentration of any one of reactant with passage of time .
`"Rate of reaction"=("Rate of disappearance of reactant")/("Time taken")`
`r =(-dx)/(dt)`
Thus, as the concentration of reactant decreases with passage of time, rate of rectant decreases.