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Question: 1
How HNO3can be two metals which evolve hydrogen upon reaction with HNO3?
Answer: 1
1-19In laboratory,nitric acid is prepared by heating potassium nitrate crystals with concentrated sulphuric acid.
KNO3(s)+ H2SO4(conc)---------->KHSO4(aq)+ HNO3(aq)
KNO3(s)+ H2SO4(conc)---------->KHSO4(aq)+ HNO3(aq)