Question

A solution of hydrochloric acid needs to be neutralized by barium solution. The beaker on top shows a hydrochloric acid solution.
Which of the beakers containing barium hydroxide will just neutralize the beaker of hydrochloric acid shown?

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is B B

For neutralising, no. of $\left[H^{+}\right]$ in acid $=$ no. of $O{H}^{-}$ in base.

No. of $H^{+}$ in acid [above one] $=4$

So, $B$ which contains $4$ $O{H}^{-}$ is correct.