1
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Henry's law constant for the solubility of $$\mathrm{N}_2$$ gas in water at $$298 \mathrm{~K}$$ is $$1.0 \times 10^5 \mathrm{~atm}$$. The mole fraction of $$\mathrm{N}_2$$ in air is 0.8 . The number of moles of $$\mathrm{N}_2$$ from air dissolved in 10 moles of water at $$298 \mathrm{~K}$$ and $$5 \mathrm{~atm}$$ pressure is

A
$$4.0 \times 10^{-4}$$
B
$$4.0 \times 10^{-5}$$
C
$$5.0 \times 10^{-4}$$
D
$$4.0 \times 10^{-6}$$
2
KCET 2021
MCQ (Single Correct Answer)
+1
-0

A pure compound contains $$2.4 \mathrm{~g}$$ of $$\mathrm{C}, 1.2 \times 10^{23}$$ atoms of $$\mathrm{H}, 0.2$$ moles of oxygen atoms. Its empirical formula is

A
$$\mathrm{C}_2 \mathrm{HO}$$
B
$$\mathrm{C}_2 \mathrm{H}_2 \mathrm{O}_2$$
C
$$\mathrm{CH}_2 \mathrm{O}$$
D
$$\mathrm{CHO}$$
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Choose the correct statement.

A
$$K_{\mathrm{H}}$$ value is same for a gas in any solution.
B
Higher the $$K_{\mathrm{H}}$$ value more the solubility of gas.
C
$$K_{\mathrm{H}}$$ value increases on increasing the temperature of the solution.
D
Easily liquefiable gases usually has lesser $$K_{\mathrm{H}}$$ values.
4
KCET 2021
MCQ (Single Correct Answer)
+1
-0

The $$K_{\mathrm{H}}$$ value ($$\mathrm{K}$$ bar) of argon (I), carbondioxide (II), formaldehyde (III) and methane (IV) are respectively $$40.3,167, 1.83 \times 0^{-5}$$ and 0.413 at $$298 \mathrm{~K}$$. The increasing order of solubility of gas in liquid is

A
I < II < IV < III
B
III < IV < II < I
C
I < III < II < IV
D
I < IV < II < III
EXAM MAP