Ideal Solutions

Q.

An ideal solution is that which:

1. Has no connection with Raoult's law
2. Shows positive deviation from Raoult's law
3. Shows negative deviation from Raoult's law
4. Obeys Raoult's law

Q.

Which property is shown by an ideal solution?

1. It follows Raoult's law

2. 

3. 

4. All of these

Q. The total vapour pressure of an ideal solution obtained by mixing $4mol$ of A and $6mol$ of B at ${25}^{\circ }C$, is $210torr$. What is the vapour pressure (in $torr$) of pure B at the same temperature?
(Given, Vapour pressure of pure A at ${25}^{\circ }C$ is $250torr$)

1. 190.1
2. 174.5
3. 183.3
4. 160

Q.

Which one of the following is non-ideal solution?

1. n-hexane + n-heptane
2. Benzene + toluene
3. Ethyl bromide + ethyl iodide
4. CCl₄+CHCl₃

Q.

An example of near ideal solution is

1. 

2. 

3. 

4. n-heptane and n-hexane

Q.

If we mix two liquids and heat is released then

1. None of these
2. $\Delta H_{mix}>0$
3. $\Delta H_{mix}<0$
4. $\Delta H_{mix}=0$

Q. For ideal liquid- liquid solution.

1. Intermolecular forces(IMF) of solvent> IMF of solute
2. Intermolecular forces of solvent< IMF of solute
3. Intermolecular forces between solute and solvent = 0
4. Intermolecular forces of solvent = IMF of solute

Q. What are the conditions for an ideal solution?

1. $\Delta V_{mix}=0$
2. $\Delta V_{mix}\ne 0$
3. $\Delta H_{mix}=0$
4. $\Delta U_{mix}=0$

Q. A & B are two liquids mixed together. In solution A - B attractive forces are weaker than A-A & B-B attractive forces.

1. True
2. False
3. \N
4. \N

Q.

When 5.85 g of NaCl and 6 g of urea are dissolved in 1000 g of water, the freezing point gets depressed by $K_f$ for water is 1.86

1. 0.186

2. 1.86

3. 0.558

4. 0.372