Pick out the incorrect statement

Options

A. When a sample of `H_(2)SO_(4)` is treated with an equal number of mol of NaOH, then entire sample of acid is half neutralised
B. When a sample of `Ba(OH)_(2)` is treated with an equal number o mol of HCl entire sample of base is neutralised.
C. When a given number of mole of `H_(2)SO_(4)` is treated with half of the number of mol of `Ba(OH)_(2)` , half of the acid is completely neutralised.
D. When a sample of NaOH is treated with half the number of mol of HCl, half of the base is completely neutralised.

Answer

B

Explanation

Statement (B ) is not correct. The correct statement is 'When a sample of `Ba(OH)_(2)` is treated with an equal number of mol of HCl, half of the sample of base is completely neutralised.'
Reason`Ba(OH)_(2)` is a strong base which exists in solution entirely as `Ba^(2+)` and `OH^(-)` ions.
Statement (A ) is correct. Reason. `HSO_(4)^(-)` is a weak base `(K_(2)=1.2 xx 10^(-2))`
Statement (C ) is correct , `BaSO_(4)` precipitates eliminating the possibility that the neutralisation could step at `HSO_94)`.