1
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

A 0.02 M solution of pyridinium hydrochloride has $\mathrm{pH}=3.44$. The ionisation constant of pyridine is

A
$1.5 \times 10^{-7}$
B
$1.5 \times 10^{-9}$
C
$15 \times 10^{-11}$
D
$1.5 \times 10^{-8}$
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

Using the Gibbs free energy change, $\Delta G^{\circ}=+63.3 \mathrm{~kJ}$. For the reaction,

$$\mathrm{Ag}_2 \mathrm{CO}_3 \longrightarrow 2 \mathrm{Ag}^{+}(a q)+\mathrm{CO}_3^{2-}(a q)$$

The $K_{\text {sp }}$ of $\mathrm{Ag}_2 \mathrm{CO}_3(s)$ in water at $25^{\circ} \mathrm{C}$ is

A
$2.9 \times 10^{-5}$
B
$8.0 \times 10^{-12}$
C
$7.4 \times 10^{-26}$
D
$6.4 \times 10^{-12}$
3
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%
4
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$$^{-14}$$
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