Which one of the following pairs of substances on reaction will not evolve H2 gas ?

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Iron and H2SO4(aq)

Iron and steam

Copper and HCl(g)

Sodium and ethyl alcohol

answer is C.

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Detailed Solution

Fe+H2SO4⇌FeSO4+H23Fe+4H2O( steam )⇌Fe3O4+4H2Cu+HCl(g)⟶ No reaction 2Na+2C2H5OH⟶2C2H5ONa+H2

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