A start of reaction, concentration of reactants are on

Explanation

At the start of a reaction, the concentration of reactants is on the higher side. This is because, initially, the reaction has just begun, and the reactants are present in higher concentrations before they start getting consumed and converted into products. As the reaction proceeds, the concentrations of reactants gradually decrease, and the concentrations of products increase.For a generic reaction:Reactant→ProductAt the start of the reaction, the reactant concentration is higher, and as the reaction progresses, the concentration of the reactant decreases while the concentration of the product increases.