Q37Short answer
Iqbal treated a 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.
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The produced gas can be identified by bringing a burning match stick near the reaction vessel, a pop sound is produced M + 2NaOH → Na2MO2 + H2 M + 2HCl → MCl2 + H2 The element is a metal