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Questions  

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

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By Expert Faculty of Sri Chaitanya
a
Iron and H2SO4(aq)
b
Iron and steam
c
Copper and HCl(g)
d
Sodium and ethyl alcohol

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detailed solution

Correct option is C

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

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 The oxidation number of Mn in the product of alkaline oxidative fusion of MnO2, is 

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