Question

The rate of reaction is measured either by an increase in the amount of product or by the decrease in the amount of reactant per unit interval of time of reaction.
If true enter 1, if false enter 0.

Answer 1

In chemical reaction generally $A\to B$ that is reactants react to give product.
As reactants react their mass gradually decreases and converted into product. If 100% reaction is done then whole reactants gets consumed.
To measure rate we calculate change in conc. per unit time for both reactants and product
$\frac{-d\left[R\right]}{dt}=\frac{d\left[P\right]}{dt}mol/lit\cdot sec$
hence TRUE