Which equation represents a neutralization reaction ?

A)6HC1O —> 4HCL +2HCLO3
B)CH4 +2O2—>CO2+2H20
C) Ca(OH)2+H2SO4–>CaSO4+2H2O
D)Ba(OH)2+Cu(NO3)2—>Ba(NO3)2+Cu( OH)2

C) Ca(OH)₂ + H₂SO₄    →  CaSO₄ + 2H₂O

Explanation:

Neutralization reaction:

When an acid and base react they form water and salt.The reaction is called neutralization reaction.

General equation:

HX + BOH    →    BX   +  H₂O

From given reaction equations only option C is correct because only this reaction gives salt and water.

Chemical equation:

Ca(OH)₂ + H₂SO₄    →  CaSO₄ + 2H₂O

Calcium hydroxide is acting as a base. Sulfuric acid is an acid. Both these reactants react to form salt which is calcium sulfate and water.

Calcium hydroxide dissociate to gives Ca²⁺ ion and OH⁻ while H₂SO₄ dissociate to gives H⁺ and SO₄²⁻.  Ca²⁺  and SO₄²⁻ react to form salt CaSO₄  while OH⁻ and H⁺ form water.