1
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the depression in freezing point of an aqueous solution containing a solute, which is neither dissociated nor associated, is $$\mathbf{a} \mathrm{K}$$ with $$\mathrm{K}_{\mathrm{f}}=\mathbf{b ~ K ~ k g ~ m o l}{ }^{-1}$$, what would be the elevation in boiling point $$(\mathrm{X})$$ for this solution if its $$\mathrm{K}_{\mathrm{b}}=\mathbf{\mathrm { ~K } \mathrm { ~K } \mathrm { ~kg } \mathrm { ~mol }}{ }^{-1}$$ ?

A
$$ \mathrm{X}=2 \mathrm{c} \times \frac{b}{a} $$
B
$$ X=c \times \frac{a}{2 b} $$
C
$$ X=c \times \frac{a}{b} $$
D
$$ \mathrm{X}=\mathrm{c} \times \frac{b}{a} $$
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

The system that forms maximum boiling azeotropes is

A
acetone-chloroform
B
ethyl alcohol-water
C
benzene-toluene
D
CS$$_2$$ + acetone
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following does not affect solubility of a gas in liquid?

A
Nature of gas and liquid
B
Pressure
C
Concentration
D
Temperature
4
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Which among the following forms minimum boiling azeotropes?

(i) Heptane + Octane

(ii) Water + Nitric acid

(iii) Ethanol + Water

(iv) Acetone + Carbon dioxide

A
(i), (ii), (iv)
B
(i), (ii) only
C
(i), (iii), (iv)
D
(iv) only
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