When the first element of the periodic table is treated with dioxgyen , it gives a compound whose soilds state floats on its liquid state. This compound has an ability to act as an well as a base. What products will be formed when this compound undergoes autoionsation?

Answer

N/a

Explanation

The first elements of the periodic table is hydrogen and its molecular form is dihydrogen `(H_(2))`. When `H_(2)` reacts with `O_(2)`, Water is formed . Water is a liquid at room temperature. When liquied water freezes, it expands to form ice.
Density of ice is lower than that of liquid water and hence ice floats over water. Water is amphoteric in nature. It acts as a base in presence of strong acids and as an acid in presence of strong bases.
`underset("Base"_(1))(H_(2)O(l)) + underset("Acids"_(2))(H_(2)S(aq)) to underset("Acid"_(1))(H_(3)O^(+)(aq))+ underset("Base"_(2))(HS^(-)(aq))`
`underset(("Acid"_(1)))(H_(2)O(l)) to underset ("Base"_(2))(NH_(3)(aq))to underset("Acid"_(2))(NH_(4)^(+)(aq)) + underset("Base"_(1))(OH^(-)(aq))`
Due to amphoteric character, water undergoes self ionisation as showm below
`underset("Acid"_(1)) (H_(2)O(l)) + underset("Base"_(2))(H_(2)O(aq)) to underset(("Conjugate acid"))underset("Acid"_(2))(H_(3)O^(+)(aq)) + underset(("Conjugate base"))underset("Base"_(1))(OH^(+)(aq))`
This self inosiation of water is called auto -protolysis or autoinisation.