Answers

2016-03-16T20:22:41+05:30
I guess d) Ammonia but i am not sure
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2016-03-16T20:25:58+05:30
Your answer is  b) Hydrogen.

Examples: 1) 2Na + H2so4 --------> Na2So4 + H2

                  2) Mg + 2HCl -----------> MgCl2 + H2
                 
                  3) 2K + H2So4 ---------> K2So4 + H2

Please mark it brainiest answer as i mentioned three extra examples.....
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