Detergents

Q.

Which among the following materials are used to reduce surface tension of water?

1. Surfactants

2. Carbonates

3. Aldehydes

4. All the above

Q.

Synthetic detergents are ___ effective in hard water than soaps.

1. They are highly soluble in water

2. None of these

3. Their Ca⁺⁺ and Mg⁺⁺ salts are water soluble

4. Their Ca⁺⁺ and Mg⁺⁺ salts are insoluble in water

Q. Which of the following statements are correct for soaps and detergents?

1. Detergents are not used in cosmetics.
2. Detergents are used in cosmetics.
3. Soft soap causes irritation to the skin.
4. Hard soap causes irritation to the skin.

Q.

73) Mention the application of different kinds of soaps.

Q. Which of the following materials are detergents?

1. Shampoo
2. Washing bar
3. Toothpaste
4. Soap nut

Q. What are the uses of synthetic detergents?

Q.

Detergents give scum with hard water.

1. True

2. False

Q. Which amongst the following substances are surfactants?

1. Shampoo
2. Soap
3. Common salt
4. Oil

Q.

Which material reduces the surface tension of the water?

1. Surfactants

2. Oils

3. None of these

4. Salts

Q. Soaps are acidic in nature.

1. True
2. False

Q.

What is the difference between Natural detergents and man-made detergents ?

Q.

What is the difference between Natural detergents and man-made detergents ?

Q.

Soaps and detergents are two types of ___

Q. The sheared skin is washed thoroughly with soap (or) detergents to remove dirt, dust and grease. This process is called as

1. Scouting
2. Sorting
3. Grading
4. Spinning

Q. What are the two parts of a soap molecule, and how are they different? [3 Marks]

Q. Name some additives that can be added to detergents.

Q.

Scratches on polymethyl methacrylate polymer glass can be easily wiped out by

1. Acetate

2. Isocyanide

3. Acetone

4. Methyl carbonate

Q. The cleansing action of soap is due to the formation of ___ in water.

Q. What are the uses of synthetic detergents?

Q.

Which of the following pairs are correct?

1. Soap - Ammonium or Sulphonate salts of long chain carboxylic acids

   Detergent - Sodium or Potassium salts of long-chain carboxylic acids

2. Detergent - Ammonium or Sulphonate salts of long chain Carboxylic acids

   Soap - Sodium or Potassium salts of long-chain Carboxylic acids

3. Detergent - Ammonium or Sodium salts of long chain Carboxylic acids

   Soap - Sodium or Sulphonate salts of long-chain Carboxylic acids

4. None of these

Q. Give one advantage of detergents over soaps. [1 mark]

Q. The sheared skin is washed thoroughly with soap (or) detergents to remove dirt, dust and grease. This process is called as

1. Sorting
2. Scouting
3. Grading
4. Spinning

Q. Cleansing action of soap is due to

1. adsorption of oil and grease on the hydrophobic centres of soap micelles and, which are then be washed away
2. adsorption of oil and grease on the hydrophilic centres of soap micelles and, which are then be washed away
3. adsorption of oil and grease on the hydrophilic and hydrophobic centres of soap micelles and, which are then be washed away
4. it is not at all related with micelles

Q. Explain the term 'cosmetics' 'talc'.Name a few main ingredients in cosmetics the role they play.