Why HNO3 does not evolve H2 gas with metal??
shashi11malik:
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HNO3 DOESN'T EVOLVE HYDROGEN GAS ON REACTION WITH METALS BECAUSE,NITRIC ACID IS A STRONG OXIDISING AGENT AND OXIDISES THE HYDROGEN EVOLVED TO WATER AND ITSELF IS REDUCED TO NITROGEN OXIDE(NO,N2O,NO2).
EXCEPTIONS:
MANGANESE AND MAGNESIUM ON REACTION WITH HNO3 IT EVOLVES HYDROGEN GAS
EXCEPTIONS:
MANGANESE AND MAGNESIUM ON REACTION WITH HNO3 IT EVOLVES HYDROGEN GAS
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