Saturated,Unsaturated and Supersaturated Solution

Q.

Question 05
Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon.........
(a) temperature (b) nature of solute
(c) pressure (d) nature of solvent

Q.

van't Hoff factor for 1M ideal solution is

1. 0.01

2. 1.0

3. 0.2

4. 0.1

Q.

Question 04
A beaker contains a solution of substance 'A'. Precipitation of substance 'A' takes place when small amount of 'A' is added to the solution. The solution is ............

Q. When we should take p0-ps/p0 and p0-ps/ps if moles of solute are not given?

Q.

What is the osmotic pressure of a solution containing 3.42 g of cane sugar in 1litre solution at 27^oC .Molar mass of cane sugar is 342 g.

1. 0.2 atm

2. 0.246 atm

3. 2.46 atm

4. 1 atm

Q. A solution is separated from pure solvent by a semipermeable membrane at 298 K. The difference in the height of the solution and the solvent is 0.9 m. If Kf and freezing point of the solvent are 30 K kg mol1 and 250.3 K, respectively, the temperature at which the solution freezes is: (a) 250.10 K (c) 250.20 K (ISAT 2010) (b) 250.25 K (d) 250.05 K

Q. 25g of a sample contains 50% MgCl2 and 50% MgSO4.The % of Mg in the mixture is

Q. Change in volume when 100 ml PH3 decomposed to solid phosphorus and H2 gas A.Increase in 50 ml B. Decrease in 50 ml C.increase in 150 ml D. Decrease in 200 ml

Q. what is polar molecular solids?

Q. Pleae explain the concept of selective precipitation in detail

Q.

We all love carbonated drinks. We know that carbon dioxide is dissolved in water to make that drink. But if I try to push in more and more carbon dioxide into water at the same temperature, what would happen?

1. It will keep dissolving till infinity.
2. The carbon dioxide molecules will destroy water molecules.
3. After a point, carbon dioxide will become carbon monoxide.
4. After a certain point, carbon dioxide gas simply won't dissolve. It will bubble out.

Q.

Harry Potter wanted to make a supersaturated solution of dragonwood in his potions class. Select from the following which would allow him to make one.
Note: Cauldron is just a vessel.

1. Reduce the volume of water in the cauldron.
2. Increase the temperature of water.
3. Increase the pressure of the gas.
4. Reduce the pressure of the gas.

Q. 38.Dry air is slowly passed through three solutions of different concentrations c1, c2, c3; each containing non volatile NaCl as solute and water as solvent. if the vessel 2 gain weight and vessel 3 looses weight, then a)c1>c2 b)c1c3

Q. For carrying reverse osmosis for desalination of water, the material used for making semipermeable membrane is:

1. potassium nitrate
2. cellulose acetate
3. parchment membrane
4. cell membrane

Q. What is tincture of iodine? What is its use?

Q. If α = 25% for NaCl then the vant Hoff factor will be

Q. Fe2+ is more stable or Fe3+?

Q.

500 mL of a monoatomic gas X diffuses through a hole at a pressure of 4 atm and 127.1500 mL of another elemental diatomic gas Y diffuses through the same hole at pressure of 2 atm and 27. If the time taken for both the diffusion process is same, then compare the atomic weights of the two gases.

Q.

Harry: Hey Hermione, does a supersaturated solution made by increasing temperature stay like that forever when left idle in a room?
Hermione gave him a blank look thinking Harry was an idiot.

Why did Hermione think Harry was an idiot?

1. Because supersaturated solutions stay forever once made.
2. Because a solution can never be supersaturated. It is an idealistic phenomenon.
3. Because a supersaturated solution can be formed for a limited time only.
4. Because all solutions are supersaturated.

Q. 22. What is azeotropic mixture

Q. A beaker contains a solution of substance A. Precipitation of substance Atakes place when small amount of A is added to the solution. The solution is_________.

a. saturated

b. supersaturated

c. unsaturated

d. concentrated

Q.

Harry: Hey Hermione, does a supersaturated solution made by increasing temperature stay like that forever when left idle in a room?
Hermione gave him a blank look thinking Harry was an idiot.

Why did Hermione think Harry was an idiot?

1. Because supersaturated solutions stay forever once made.
2. Because a solution can never be supersaturated. It is an idealistic phenomenon.
3. Because a supersaturated solution can be formed for a limited time only.
4. Because all solutions are supersaturated.

Q.

In a saturated solution, there exists an equilibrium between:

1. solvent and excess of solid

2. solution and excess of solid

3. solid and excess of solvent

4. solid and excess of solution

Q. Solution which distill without any change in composition or temperature are called :

1. Saturated
2. Supersaturated
3. Ideal
4. Azeotrope

Q. Volume ar NTP of oxygen required to completely burn 1kg of coal

Q.

Harry Potter wanted to make a supersaturated solution of dragonwood in his potions class. Select from the following which would allow him to make one.
Note: Cauldron is just a vessel.

1. Reduce the volume of water in the cauldron.
2. Increase the temperature of water.
3. Increase the pressure of the gas.
4. Reduce the pressure of the gas.

Q. A normal solution.

1. Contains one gram equivalent mass of the substance in one litre solution
2. Contains one gram molecular mass of the substance in one litre solution
3. Contains one gram equivalent mass of the substance in $100mL$ of the solution
4. Is that whose concentration is known

Q. Where should hydrogen be actually placed?

Q.

1. True
2. False

Q. When does a precipitate form?

1. When something is insoluble in solution.
2. When something is soluble in solution.
3. When too much of a substance is added to solution.
4. Whenever a solid is added to solution.
5. Whenever liquid is added to a solution.