Q.
Zn gives H2 gas with H2SO4 and HCI but not with HNO3 because
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a
Zn acts as oxidant when reacts with HNO3
b
HNO3 is weaker acid than H2SO4 and HCI
c
In electrochemical series Zinc is above hydrogen
d
NO3– is reduced in preference to H3O+
answer is D.
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Detailed Solution
In HNO3 , H+ can reduce to H2 and NO-3 can reduce to NO or N2O, NO2.So NO-3 reduces in preference to H+ or H3O+ when HNO3 acts like oxidant.
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