JEE Main 2013 (Offline) | Ionic Equilibrium Question 92 | Chemistry

Three reactions involving $$H_2PO_4^−$$ are given below :

(i) H₃PO₄ + H₂O $$\to$$ H₃O⁺ + $$H_2PO_4^−$$

(ii) $$H_2PO_4^−$$ + H₂O $$\to$$ $$HPO_4^{2−}$$ + H₃O⁺

(iii) $$H_2PO_4^−$$ + OH^- $$\to$$H₃PO₄ + O^2-

In which of the above does $$H_2PO_4^−$$ act as an acid?

(ii) only

(i) and (ii)

(iii) only

(i) only

AIEEE 2010

MCQ (Single Correct Answer)

-1

Solubility product of silver bromide is 5.0 $$\times$$ 10^–13. The quantity of potassium bromide (molar mass taken as 120g of mol^–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is :

1.2 $$\times$$ 10^–10 g

1.2 $$\times$$ 10^–9 g

6.2 $$\times$$ 10^–5 g

5.0 $$\times$$ 10^–8 g

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