Question

Assertion: The rate of the reaction of iron and hydorchloric acid will increase if the iron pieces are cut into smaller pieces.
Reason: Increasing surface area of a reactant helps to reduce activation energy.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
  
• D. Assertion is false but Reason is true
  
• E. Both Assertion and Reason are false
  

Answer 1

Answer: (A)

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

It is known that increasing the surface area of the reactants results in more collision of the reactants molecules in any given time which increases the rate of reaction. Due to an increase in surface area of reactant, the activation energy is reduced & the rate of reaction increases.

So, assertion & reason are true & reason is the correct explanation of assertion.