Question

10mL of a solution of NaOH is found to be completely neutralised by 8mL of a given solution of HCl. HCl solution required to neutralise 50mLof NaOH will be

• A. 10
• B. 20
• C. 30
• D. 40

Answer 1

The correct option is D 40

This solution can be obtained by using the unitary method.
10mL of HCl is neutralized by 8mL of NaOH
50mL of HCl is neutralized by $=(8\times 50)÷10$
= 40
The HCl solution required to neutralise 50mLof NaOH is 40mL.