1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A solute $$\mathrm{X}$$ is found to exist as a dimer in water. A 4 molal solution of $$\mathrm{X}$$ shows a boiling point of $$101.04^{\circ} \mathrm{C}$$. What is the percentage association of $$\mathrm{X}$$ ? ($$\mathrm{K}_{\mathrm{b}}$$ for water $$=0.52 \mathrm{~K} / \mathrm{m}$$).

A
75
B
100
C
80
D
40
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

$$200 \mathrm{ml}$$ of an aqueous solution contains $$3.6 \mathrm{~g}$$ of Glucose and $$1.2 \mathrm{~g}$$ of Urea maintained at a temperature equal to $$27^{\circ} \mathrm{C}$$. What is the Osmotic pressure of the solution in atmosphere units?

$$\mathrm{R}=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~K}{ }^{-1} \mathrm{~mol}^{-1}$$ : Molecular Formula: Glucose is $$\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6$$ and of Urea is $$\mathrm{NH}_2 \mathrm{CONH}_2$$

A
6.24
B
1.56
C
9.84
D
4.92
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

An aqueous solution of glucose boils at $$100.01^{\circ} \mathrm{C}$$. The number of glucose molecules in a solution containing $$100 \mathrm{~g}$$ of water is _________ [$$\mathrm{K}_{\mathrm{b}}$$ for water is $$0.5 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$]

A
$$ 6.022 \times 10^{21} $$
B
$$ 1.204 \times 10^{21} $$
C
$$ 1.204 \times 10^{23} $$
D
$$ 6.022 \times 10^{23} $$
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The system that forms minimum boiling azeotrope is :

A
Phenol-Aniline
B
Ethyl alcohol - Water
C
Acetone-Chloroform
D
Nitric Acid - Water
COMEDK Subjects
EXAM MAP