Question

The minus sign in rate =-$\frac{d\left[A\right]}{dt}$ indicate the ______ in concentration of the ______ with time. The rate of a reaction is always ______ quantity. The rate of reaction increases with ______ in concentration of reactants. The blanks in the question corresponds to

• A. decrease, products, positive, increase
• B. increase, reactants, negative, decrease
• C. decrease, reactants, positive, increase
• D. increase, products, positive, increase

Answer 1

Answer: (C)

Rate $=-d\frac{[A]}{dt}$
The minus $\mathrm{sign}$ in rate $=d\frac{[A]}{dt}$ indicates decrease in concentration of reactant with time.
The rate is always positive quantity. The rate of reaction increases with increase in concentration of reactants.