Question

When a concentrated solution is diluted by adding more water, molarity of the solution remains unchanged. Product of moles of a solute and volume is equal to the molarity.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (D)

If both assertion and reason are false

Answer 2

Molarity equation is written as $M_{1} V_{1}=M_{2} V_{2}$ thus if the $V_{2}$ changes $M_{2}$ also changes. Molarity $=\frac{\text { moles of solute }}{\text { volume of solution in litre }}$