Question

explain taking example of magnesium metal​

Answer 1

Answer: H2 Gas is released Between a reaction between acid and a metal

Explanation:

Explaining you as you wish with considering Mg as metal

consider a reaction between Mg and HCl

Mg(s)+HCL(aq)------MgCl2(s)+H2(g)

here it is not a balanced equation  

balanced equation is

Mg(s)+2HCl-------MgCl2(s)+H2

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