1
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

What is the degree of dissociation of $$0.05 \mathrm{~M~NH}_3$$ if its $$\mathrm{pK}{ }_a$$ is 4.75 and $$\mathrm{pH}$$ is 11 ?

A
2%
B
0.2%
C
0.5%
D
5%
2
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

The $$[\mathrm{OH}]^{-}$$ in a solution is $$1 \mathrm{~mol} \mathrm{~L}^{-1}$$. The $$\mathrm{pH}$$ of the solution is

A
1
B
0
C
14
D
10$$^{-14}$$
3
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

The solubility of $$\mathrm{Fe}(\mathrm{OH})_3$$ is $$x \mathrm{~mol} \mathrm{~L}^{-1}$$. Its $$K_{\mathrm{sp}}$$ would be

A
$$9 x^3$$
B
$$3 x^4$$
C
$$27 x^4$$
D
$$9 x^4$$
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