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 he can identify the produced gas. Write chemical equations for both the reactions.
The lustrous, divalent element must be a metal. Metals that are very reactive reacts with sodium hydroxide readily and bubbles are produced due to formation of hydrogen gas. When a burning candle is brought near the reaction vessel, a pop sound is produced.
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