- 1(current)
Q. No.The correct statements about micelles are:
| 1. | Formed by substances such as soaps and detergents when dissolved in water. |
| 2. | Substances whose molecules contain a hydrophobic and a hydrophilic part. |
| 3. | Molecules whose hydrophobic parts are present towards the center, while the hydrophilic parts are pointing towards the outside. |
| 4. | All of the above. |
Match the types of colloidal systems given in Column I with the names given in Column II.
| Column I | Column II |
| A. Solid in Liquid | 1. Foam |
| B. Liquid in solid | 2. Sol |
| C. Liquid in Liquid | 3. Gel |
| D. Gas in Liquid | 4. Emulsion |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
Match the items given in Column I and Column II.
| Column I | Column II |
| A. Protective colloid | 1. FeCl3 + NaOH |
| B. Liquid-liquid colloid | 2. Lyophilic colloids |
| C. Positively charged colloid | 3. Emulsion |
| D. Negatively charged colloid | 4. FeCl3 + hot water |
Codes
| A | B | C | D | |
| 1. | 3 | 2 | 4 | 1 |
| 2. | 1 | 4 | 3 | 2 |
| 3. | 2 | 3 | 4 | 1 |
| 4. | 4 | 1 | 3 | 2 |
Emulsions can be used as:
1. For cleansing action of soaps.
2. For digestion of fats in the intestines.
3. As antiseptics and disinfectants.
4. All of the above.
Correct statement about emulsion is:
| 1. | The dispersed phase and dispersion medium are liquids. |
| 2. | The dispersed phase and dispersion medium are solids. |
| 3. | The dispersed phase and dispersion medium are gases. |
| 4. | The dispersed phase are solids and dispersion medium are liquids. |
Match the items in Column I and Column II.
| Column I | Column II |
| A. Dialysis | 1. Cleansing action of soap |
| B. Peptization | 2. Coagulation |
| C. Emulsification | 3. Colloidal sol formation |
| D. Electrophoresis | 4. Purification |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
An emulsion is stabilised by:
1. Emulsifiers.
2. Peptizing agent.
3. Biochemical catalysts.
4. None of the above.
The charge present on micelles is:
1. Negative charge.
2. Positive charge.
3. Both negative and positive charges.
4. None of the above.
Milk can be preserved by adding a few drops of?
1. Formic acid solution
2. Formaldehyde solution
3. Acetic acid solution
4. Acetaldehyde solution
Among the following surfactant molecules, the surfactant with the lowest CMC in aqueous solution at ambient conditions is:
1. CH3(CH2)15N+(CH3)3Br-
2. CH3(CH2)11OSO3- Na+
3. CH3(CH2)6COO-Na+
4. CH3(CH2)11N+(CH3)3Br-
- 1(current)
Q. No.
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