1.

How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?

Answer»

When an active rnetal like Zn reacts with HCl, the gas produced burns with a pop sound which indicates that it is hydrogen gas.

 Zn(s) + 2HCl(aq) -----> ZnCl2(s)+ H2(g)



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