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Equilibrium

Question

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Three reactions involving H₂PO₄^- are given below
I. H₃PO₄ + H₂O → H₃O⁺ + H₂PO₄^-
II. H₂PO₄^- + H₂O→ HPO₄^2- + H₃O⁺
III. H₂PO₄^- + OH^- → H₃PO₄ + O^2-
In which of the above does H₂PO₄^- act as an acid

(II) only

(I) and (II)

(III) only

(I) only

Solution

A.

(II) only

Some More Questions From Equilibrium Chapter

Give two examples of physical equilibrium.

What kind of molecules in a liquid can evaporate?

Name the factors on which vapour pressure of any liquid depends.

Which measurable property becomes constant in water vapour equilibrium?

Give an example from daily life in which there is gas solution equilibrium?

A crystal of common salt of a given mass is kept in its aqueous solution. After 24 hours, its mass remains the same. Is the crystal in equilibrium with the solution?

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