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H2SO4 in aqueous medium ionises in two s...

`H_2SO_4` in aqueous medium ionises in two steps
`H_(2)SO_(4)(aq) + H_(2)O(l) to H_(3)O^(+)(aq) + HSO_(4)^(-) (aq), K_(a1) = x`
`HSO_(4)^(-) (aq) + H_(2)O(l) to H_(3)O^(+) (aq) + SO_(4)^(2-), K_(a2) =y`
What is relation between x and y

A

`x lt y`

B

`x =y`

C

`x gt y`

D

`x gt gt y`

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