Emulsions

Q.

How many types of emulsions are there?

Q. what is complex formation?

Q. What is sp mixing

Q.

Give four uses of emulsions.

Q. normality

Q.

Sulphides ores are generally concentrated by

1. Roasting

2. Reduction by carbon

3. Froth floatation process

4. Gravity separation

Q.

What is critical miscelle concontration?

And how does it affect the miscelle formation?

Q.

If a solid is dispersed in a liquid, the colloid is known as:

1. gel

2. sol

3. emulsion

4. none of the above

Q.

Why are detergent better cleansing agent than soaps? Explain.

Q.

Which of the following is not an emulsion?

1. Milk

2. Cold cream

3. Butter

4. Shaving cream

Q. What is the relationship between molality, molarity and density of a solution?

Q.

Action of soap is due to emulsification and micelle formation. Comment.

Q. How to round off 2.252 to 2 significant figures?

Q. what is jones reagent

Q.

difference between oil in water and water in oil emulsion. how they can be distinguished.

Q. why normality= molarity * n-factor

Q.

What are emulsion ? What are their different types ? Give example of each type.

Q. Is it necessary to learn all the defination of si units?

Q. What is emulsion? How are emulsions classified? Give example?

Q.

Give an example of a solution of a gas in a liquid?

Q. Difference between molarity, molality and normality.

Q.

What are micelles? Give an example of a micellers system.

Q.

Match the columns:

Column 1	Column 2
Milk	Gel
Fog	Foam
Cheese	Emulsion
Soap lather	Aerosol

Q. 73. Convert acetone to chloroform and vice versa

Q. Soaps can be classified as :

1. carbohydrates
2. ethers
3. salts of higher fatty acids
4. none of these

Q.

Which of the following best describes a sol &gel colloidal system?

1. jellies & fog

2. milk & butter

3. paints & marble

4. cheese & paint

Q.

Which of the following statements is incorrect about soaps and detergents?

1. Synthetic detergents can be used in hard water.

2. Soaps produce lather easily with hard water.

3. Soaps are sodium or potassium salt of higher fatty acids.

4. Soaps are prepared from natural oils and fats.

Q. Milk is an example of water in oil emulsions.

1. True
2. False
3. Ambiguous
4. Data insufficient

Q.

Water-in-oil emulsions are also called:

Q. what is the molality of 900 gms water