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H3PO4 (Phosphoric acid) is a tribasic ac...

`H_3PO_4` (Phosphoric acid) is a tribasic acid. In aqueous solution it ionises in the following three steps
`H_3PO_4overset(k_1)iffH^++H_2PO_4^-`, `H_2PO_4^(-)overset(k_2)iffH^++HPO_4^(2-)`, `HPO_4^(2-)overset(k_3)iffH^++PO_4^(3-)`. Here `K_1,K_2,K_3` are the dissociation constants of the respective three steps. The correct order of the values of three constants is

A

`K_1ltK_2ltK_3`

B

`K_1ltK_2ltK_3`

C

`K_1ltK_2ltK_3`

D

`K_1ltK_2ltK_3`

Text Solution

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The correct Answer is:
B
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