Iqbal treated a metal with a lustrous divalent element M. he saw formation of bubbles when his element was reacted with HCL and NaOH. Suggest how can we identify the gas and write the chemical equations required.
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It is a lustrous, divalent element so it is a metal and only very reactive metal can react with NaOH. In the first case; a base reacts with a metal, and in the second case; an acid reacts with a metal. Hence, hydrogen gas is most likely to be produced during these reactions.
The evolution of hydrogen gas can be checked by bringing a burning matchstick or splinter near the evolved gas. The fact that the matchstick burns with a pop sound, shows that hydrogen gas is evolved.
The reactions can be shown by following equations:
2NaOH+Zn→Na
2
ZnO
2
+H
2
2HCl+Zn→ZnCl
2
+H
2
Explanation:
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