Iqbal treated lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
Burning matchstick should be brought near the evolved gas. If matchstick burns with a pop sound, it indicates evolution of hydrogen gas.
Reaction with NaOH:
M + NaOH → Na2MO2 + H2
Reaction with HCl:
M + HCl →MCl + H2
