1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

$$\mathrm{pH}$$ of a salt solution of weak acid $$(\mathrm{p} K_a=4)$$ and weak base $$(\mathrm{p} K_b=5)$$ at $$25^{\circ}$$ is

A
6.5
B
6
C
7
D
7.5
2
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

The solubility product of sparingly soluble salt $$A X_2$$ is $$3.2 \times 10^{-11}$$. Its solubility (in mol/L) is

A
$$5.6 \times 10^{-6}$$
B
$$3.1 \times 10^{-4}$$
C
$$2 \times 10^{-4}$$
D
$$4 \times 10^{-4}$$
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