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1
MHT CET 2025 22nd April Evening Shift
MCQ (Single Correct Answer)
+1
-0

A weak monoacidic base dissociates to $1.5 \%$ in 0.001 M solution at 298 K . Calculate the dissociation constant of weak base.

A
$2.25 \times 10^{-7}$
B
$3.05 \times 10^{-7}$
C
$2.5 \times 10^{-5}$
D
$3.725 \times 10^{-6}$
2
MHT CET 2025 22nd April Evening Shift
MCQ (Single Correct Answer)
+1
-0

The solubility product of NiS is $4.9 \times 10^{-5}$ at 298 K . Calculate its solubility in $\mathrm{mol} \mathrm{dm}^{-3}$ at the same temperature?

A
$1.69 \times 10^{-3}$
B
$7.0 \times 10^{-3}$
C
$2.45 \times 10^{-3}$
D
$6.18 \times 10^{-3}$
3
MHT CET 2025 22nd April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the conjugate acid-base pair respectively from following equilibrium reaction.

$$ \mathrm{HPO}_{4(\mathrm{aq})}^{2-}+\mathrm{H}_2 \mathrm{O}_{(\ell)} \rightleftharpoons \mathrm{PO}_{4(\mathrm{aq})}^{3-}+\mathrm{H}_3 \mathrm{O}_{(\mathrm{eq})}^{+} $$

A
$\mathrm{H}_3 \mathrm{O}^{+}$and $\mathrm{H}_2 \mathrm{O}$
B
$\mathrm{H}_2 \mathrm{O}$ and $\mathrm{HPO}_4^{2-}$
C
$\mathrm{PO}_4^{3-}$ and $\mathrm{H}_3 \mathrm{O}^{+}$
D
$\mathrm{H}_3 \mathrm{O}^{+}$and $\mathrm{HPO}_4^{2-}$
4
MHT CET 2025 22nd April Morning Shift
MCQ (Single Correct Answer)
+1
-0

The solubility of sparingly soluble salt $\mathrm{AX}_2$ is $1 \times 10^{-4} \mathrm{~mol} \mathrm{dm}^{-3}$ at 298 K . Calculate its solubility product.

A
$2 \times 10^{-12}$
B
$4 \times 10^{-12}$
C
$2 \times 10^{-10}$
D
$4 \times 10^{-10}$
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