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. 

Explanation

The produced gas can be identifyed by bringing a buring matchstick near the reaction vessel, a pop sound is produced.
`M + 2NaOH rarr Na_(2)MO_(2) + H_(2)`
`M + 2HCI rarr MCI_(2) + H_(2)`
The element is a metal.