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)
20
MCQ (Single Correct Answer)
We have three aqueous solutions of NaCl labelled as ' A ', ' B ' and ' C ' with concentrations $0.1 \mathrm{M}, 0.01 \mathrm{M}$ and 0.001 M , respectively. The value of van't Hoff factor for these solutions will be in the order .......... .
A
$i_A< i_B< i_C$
B
$i_A>i_B>i_C$
C
$i_A=i_B=i_C$
D
$i_A< i_B> i_C$