Identify 'X' in the reaction: 2HCl + CuO → X + H2O
HOCl
CuCl
Cu(OH)2
CuCl2
Acids react with metallic oxides to form salt and water.
CuO + 2HCl CuCl2 + H2O
Identify X in the following reaction X + Acid → Salt +H2O