Balance the following chemical equations.
(i) `HNO_(3) + Ca(OH)_(2) rarr Ca(NO_(3))_(2) + H_(2)O `
(ii) `NaOH + H_(2)SO_(4) rarr Na_(2)SO_(4) + H_(2)O`
(iii) `NaCl + AgNO_(3) rarrAgCl +NaNO_(3)`
(iv) `BaCl_(2)+H_(2)SO_(4) rarr BaSO_(4) + HCl`

Options

A. `HNO_(3) + Ca(OH)_(2) rarr Ca(NO_(3))_(2) + H_(2)O `
B. `NaOH + H_(2)SO_(4) rarr Na_(2)SO_(4) + H_(2)O`
C. `NaCl + AgNO_(3) rarrAgCl +NaNO_(3)`
D. `BaCl_(2)+H_(2)SO_(4) rarr BaSO_(4) + HCl`

Explanation

(i) `2HNO_(3)+Ca(OH)_(2) rarr Ca(NO_(3))_(2)+2H_(2)O`
(ii) `2NaOH + H_(2)SO_(4) rarr Na_(2)SO_(4)+2H_(2)O`
(iii) `NaCl+AgNO_(3)rarr AgCl + NaNO_(3)`
(iv) `BaCl_(2)+H_(2)SO_(4) rarr BaSO_(4)+2HCl`.