Which of the following represents a precipitation reaction?
H2SO4 + NaCl \(\to\) NaHSO4 + HCl
Fe +H2SO4 \(\to\) FeSO4 + H2
4HCl + MnO2 \(\to\) MnCl2 + 2H2O + Cl2
Na2SO4 + pb(NO3) \(\to\) PbSO4 + 2NaNO
CuO +2HCl \(\to\) Cl2 + H2O
Correct answer is D
No explanation has been provided for this answer.