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

In the analysis of III group basic radicals of salts, the purpose of adding $\mathrm{NH}_4 \mathrm{Cl}(s)$ to $\mathrm{NH}_4 \mathrm{OH}$ is

A
to increase the concentration of $\mathrm{OH}^{-}$ions
B
to precipitate the radicals of group IV and V
C
to suppress the dissociation of $\mathrm{NH}_4 \mathrm{OH}$
D
to introduce $\mathrm{Cl}^{-}$ions
2
KCET 2024
MCQ (Single Correct Answer)
+1
-0

Solubility product of $\mathrm{CaC}_2 \mathrm{O}_4$ at a given temperature in pure water is $4 \times 10^{-9}\left(\mathrm{~mol} \mathrm{~L}^{-1}\right)^2$. Solubility of $\mathrm{CaC}_2 \mathrm{O}_4$ at the same temperature is

A
$6.3 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}$
B
$2 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}$
C
$2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}$
D
$6.3 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}$
3
KCET 2024
MCQ (Single Correct Answer)
+1
-0

In the reaction between moist $\mathrm{SO}_2$ and acidified permanganate solution.

A
$\mathrm{SO}_2$ is oxidised to $\mathrm{SO}_4^{2-}$. $\mathrm{MnO}_4^{-}$is reduced to $\mathrm{Mn}^{2+}$.
B
$\mathrm{SO}_2$ is reduced to S . $\mathrm{MnO}_4^{-}$is oxidised to $\mathrm{MnO}_4$.
C
$\mathrm{SO}_2$ is oxidised to $\mathrm{SO}_3^{2-}$. $\mathrm{MnO}_4^{-}$is reduced to $\mathrm{MnO}_2$.
D
$\mathrm{SO}_2$ is reduced to $\mathrm{H}_2 \mathrm{~S}$. $\mathrm{MnO}_4^{-}$is oxidised to $\mathrm{MnO}_4$.
4
KCET 2024
MCQ (Single Correct Answer)
+1
-0

Which one of the following properties is generally not applicable to ionic hydrides?

A
Non-volatile
B
Non-conducting in solid state
C
Crystalline
D
Volatile
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