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.
ScienceClass 10CBSEAnswered 27 Mar 2026
Answer
Soln:
To identify the produced gas, lighted matchstick should be brought near the gas. If match stick burns with pop sound, it indicates the evolution of Hydrogen gas.
M+ 2NaOH Na2MO2+ H2
With HCl
M+ 2HCl MCl2+H2