Question

In which of the following case the rate of the reaction will be more?

• A. Marble chip reacting with dilute HCl.
• B. Marble powder reacting with dilute HCl.
• C. Marble stone reacting with dilute HCl.
• D. Marble piece reacting with dilute HCl.

Answer 1

The correct option is B Marble powder reacting with dilute HCl.

There are many factors which affect the rate of a reaction. The surface area of solids is one such factor which affects the rate of the reaction.
$\bullet$ The rate of reaction increases if the exposed surface area of the reactant is more.
$\bullet$ When we use the powdered form of reactants in place of a stone, piece or chip of reactants, the rate of reaction increases as the surface area exposed is more.
$\bullet$ Therefore, the rate of the reaction will be more in the case of marble powder reacting with dilute HCl.