Soaps and their Cleansing Action

Q. Detergents are more effective in than soaps.

1. soft water
2. hard water
3. saline water

Q.

Why have detergents replaced soap as a washing agent?

Q. Which of the following should be preferably used to avoid the scum formation during washing clothes?

1. Soap nut
2. Synthetic detergents
3. Soft soap
4. Natural detergents

Q.

Choose the odd one out:

1. Talc

2. Paracetamol

3. Aspirin

4. Penicillin

Q. Cleansing action of soap is due to the formation of micelles.

1. True
2. False

Q. An entrepreneur wanted to start a company that makes soaps for cleaning legs. In order to prepare such soap which of the following salt should be chosen for saponification?

1. Sodium salts
2. Calcium salts
3. Potassium salts
4. Magnesium salts

Q. Assertion (A): Hardness of water is removed by treatment with sodium carbonate.
Reason (R): Sodium carbonate reacts with soluble magnesium and calcium chloride to form water soluble compounds.

1. (A) and (R) both are correct but (R) is not the correct explanation of (A).
2. (A) is not correct but (R) is correct.
3. (A) and (R) both are correct and (R) is the correct explanation of (A).
4. (A) is correct but (R) is not correct.

Q. Soap is not effective in hard water.

1. True
2. False