Identify the compound which on reacting with sulphuric acid produces a gas that turns lime water milky.
Metal hydrogencarbonate/carbonate + Acid → Salt +Carbon dioxide + Water
CuCO3(s) + H2SO4(aq) → CuSO4(aq) + CO2(g) + H2O(l)
NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l) +CO2(g)
The carbon dioxide gas released from the above reactions turns the lime water milky.
Reaction between sodium hydroxide and sulphuric acid:
NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(l)
CH3COOH is a weak acid while CaSO4 is a salt.