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Phosphoric acid ionises as : H(3)PO(...

Phosphoric acid ionises as :
`H_(3)PO_(4)overset(K_(1))hArr H^(+)+H_(2)PO_(4)^(-)`
`H_(2)PO_(4)^(-)overset(K_(2))hArr H^(+)+H_PO_(2)^(-)`
`H_(2)PO_(4)^(2-)overset(K_(3))hArr H^(+)+PO_(3)^(-)`
The equilibrium constant, K for the reaction :
`H_(3)PO_(4)hArr 3H^(+)+PO_(4)^(3-)` is :

A

`K_(1)//K_(2) K_(3)`

B

`K_(1)+K_(2)+K_(3)`

C

`K_(3)//K_(1) K_(2)`

D

`K_(1)K_(2)K_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
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MODERN PUBLICATION-EQUILIBRIUM-Multiple Choice Questions (Level - II)
  1. Which of the following statements is not correct ?

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  2. Phosphoric acid ionises as : H(3)PO(4)overset(K(1))hArr H^(+)+H(2)...

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  3. The equilibrium constant for the reaction 2SO(2)(g)+O(2)(g)hArr 2S...

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  4. The equilibrium constant, K(p) for the reaction 2SO(2)(g)+O(2)(g)hA...

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  5. At 30^(@)C, K(p) for the dissociation reaction : SO(2)Cl(2)(g) hAr...

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  6. At a given temperature, the equilibrium constant for the reaction : ...

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  7. If K(a(1)) and K(a(2)) of sulphuric acid are 1xx10^(-2) and 1xx10^(-6)...

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  8. The pH of a solution is 6. Sufficient amount of acid is added to decre...

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  9. In a buffer solution of weak acid and its salt, when the concentration...

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  11. Given that K(a) for acetic acid is 1.8xx10^(-5) and K(b) for NH(4)OH ...

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  12. The dissociation constant of two acids are K(1) and K(2). The relative...

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  13. The addition of solid sodium carbonate to pure water causes :

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  14. The solubility product of a compound MX is 2.5xx10^(-9) at 25^(@)C. It...

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  15. What would be the solubility of AgCl in 0.1 M NaCl solution ? (K(sp)" ...

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  17. The solubility of a compound MX(2) at 25^(@)C is 5.0xx10^(-3) mol/L. I...

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  18. When a 0.1 M solution of an acid at room temperature has degree of ion...

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  19. Which of the following mixture solution has pH ~~ 1.0 ?

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  20. A buffer solution contains 0.1 M each of acetic acid and sodium acetat...

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