Explain the reaction between nitric acid and manganese?

Answer 1

Manganese and magnesium are metals. They have a low electronegativity, which is to say, they have a weak grip on their valance electrons, and can easily lose them. Hydrogen is not as metallic - it is sort of halfway between a metal and a nonmetal although under normal conditions no one would ever mistake it for a metal - and it has a higher electronegativity; it holds on to its valance electron more strongly. Hence, the manganese and magnesium donate their electrons to the hydrogen ions which then become hydrogen gas, leaving behind the manganese and magnesium in the form of ions. The electrons simply migrate to the element that attracts them more strongly.

Answer 2

Manganese reacts with dil.HNO3 to form Manganese nitrate and hydrogen gas is evolved. Mn+2HNO3-----> Mn(NO2)3+H2

Answer 3

Mn + 2HNO3 -> Mn(NO3)2 + H2