Bissoy
Login
Get Advice on Live Video Call
Earn $ Cash $ with
consultations on Bissoy App
A very dilute solution is prepared by dissolving 'x<sub>1</sub>' mole of solute in 'x<sub>2</sub>' mole of a solvent. The mole fraction of solute is approximately equal to
A
$$\frac{{{{\text{x}}_1}}}{{{{\text{x}}_2}}}$$
B
$$\frac{{{{\text{x}}_2}}}{{{{\text{x}}_1}}}$$
C
$$1 - \frac{{{{\text{x}}_1}}}{{{{\text{x}}_2}}}$$
D
$$\frac{1}{{{{\text{x}}_2}}}$$
Correct Answer:
$$\frac{{{{\text{x}}_1}}}{{{{\text{x}}_2}}}$$
The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?
A
0.2
B
0.1
C
0.4
D
0.6
Assertion (A) In osmosis, solvent molecules pass through a semipermeable membrane from a more dilute solution to a more concentrated one, when these two are separated by the semi-permeable membrane.
Reason (R) The vapour pressure of the solvent over the dilute solution is less than that over the concentrated solution.
A
Both A and R are true and R is the correct explanation of A
B
Both A and R are true, but R is not the correct explanation of A
C
A is true, but R is false
D
A is false, but R is true
What is the enthalpy change of 8 mole solution if the enthalpy change of 5 mole solute is 10 J/mole, and enthalpy of 2 mole solvent is 15 J/mole?
A
10 J/mole
B
12 J/mole
C
13 J/mole
Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be __________ atmosphere.
A
0.5
B
1
C
1.5
D
2
Consider the following statements.
1. During the pressure of osmosis, the solvent travels from the concentrated solution to the dilute solution.
2. In the reverse osmosis, external pressure is applied to the dilute solution.
Which of the statement(s) given above is/are correct?
A
Only 1
B
Only 2
C
Both 1 and 2
D
Neither 1 nor 2
A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is
A
2
B
1
C
0.5
D
0.5
In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer.
A
The entire amount of C is transferred to solvent B
B
Less than 2 kg but more than 1 kg of C is transferred to solvent B
C
Less than 1 kg of C is transferred to B
D
No amount of C is tranferred to B
The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.
A
Less than
B
More than
C
Equal to
D
Either more or less; depends on the solvent
For a dilute solution the relative lowering of vapour pressure is equal to mole fraction of solute. According to which law the statement is correct?
A
Henry`s Law
B
Dalton`s Law
C
Charles Law
D
None of the mentioned
Two feeds, 10 mole with 5 J/mole and 20 mole with 15 J/mole, product contains two streams, 5 mole with 10 J/mole and P with 25 J/mole, what is the value of P?
A
10 mole
B
12 mole
C
15 mole