15
MCQ (Single Correct Answer)
The values of van't Hoff factors for $\mathrm{KCl}, \mathrm{NaCl}$ and $\mathrm{K}_2 \mathrm{SO}_4$ respectively are ............ .
A
2, 2 and 2
B
2, 2 and 3
C
1, 1 and 2
D
1, 1 and 1
16
MCQ (Single Correct Answer)
Which of the following statements is false?
A
Units of atmospheric pressure and osmotic pressure are the same
B
In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration
C
The value of molal depression constant depends on nature of solvent
D
Relative lowering of vapour pressure, is a dimensionless quantity
17
MCQ (Single Correct Answer)
Value of Henry's constant $\mathrm{K}_{\mathrm{H}}$ ............ .
A
increases with increase in temperature
B
decreases with increase in temperature
C
remains constant
D
first increases then decreases
18
MCQ (Single Correct Answer)
The value of Henry's constant, $\mathrm{K}_{\mathrm{H}}$ is ........... .
A
greater for gases with higher solubility
B
greater for gases with lower solubility
C
constant for all gases
D
not related to the solubility of gases
19
MCQ (Single Correct Answer)
Consider the figure and mark the correct option.
A
Water will move from side $(A)$ to side $(B)$ if a pressure lower osmotic pressure is applied on piston (B)
B
Water will move from side $(B)$ to side $(A)$ if a pressure greater than osmotic pressure is applied on piston (B)
C
Water will move from side $(B)$ to side $(A)$ if a pressure equal to osmotic pressure is applied on piston (B)
D
Water will move from side $(A)$ to side $(B)$ if pressure equal to osmotic pressure is applied on piston (A)