Balance the following equations:
(i) HgO ⇢ Hg + O2
(ii) C4H10 (g) + O2 (g) ⇢ CO2 (g) + H2O (l)
(iii) BaCl2 (aq) + Al2(SO4)3 (aq) ⇢ AlCl3 (aq) +BaSO4 (aq)
Observe the reactions given below:
2Mg (s) +O2 (g) → A
CuO (s) + 2HCl (aq) → B + H2O (l)
SO2 (g) + H2O (l) → C
CO2 (g) + 2NaOH (aq) → D +H2O (l)
Which of the following are the correct options?