Q. No.Detergent that gets degraded by the action of bacteria are known as -
1. Non-biodegradable
2. Condensation
3. Biodegradable
4. Elastomers
Synthetic detergents are better than soaps because:
| 1. | Synthetic detergents work both in soft water and hard water. |
| 2. | Soaps work both in soft water and hard water. |
| 3. | Synthetic detergents work only in hard water. |
| 4. | Soaps work only in hard water. |
A space rocket is propelled by:
1. An automobilic engine
2. Nuclear Engine
3. Steam Engine
4. Mixture of fuel and oxidiser called propellant
The chemical added to soaps to impart antiseptic properties is :
1. Salvarsan
2. Bithional
3. Paracetamol
4. Iodine
The correct statement among the following during the cleansing action of soaps is:
| 1. | Hydrophobic parts of the stearate ions attach themselves to the oil droplets. |
| 2. | Hydrophilic parts of the stearate ions project outside the oil droplets. |
| 3. | Hydrophilic parts of the stearate ions attach themselves to the oil droplets. |
| 4. | Both (1) and (2) |
Match the structures given in Column I with the type of detergents given in Column II.
| Column I | Column II |
| A. CH3(CH2)16COO(CH2CH2O)n CH2CH2OH |
1. Cationic detergent |
| B. C17H35COO−Na+ | 2. Anionic detergent |
| C. CH3 − (CH2)10 CH2 SO3−Na+ | 3. Non-ionic detergent |
| D. |
4. Soap |
Choose the correct one:
| A | B | C | D | |
| 1. | 3 | 2 | 4 | 1 |
| 2. | 4 | 3 | 2 | 1 |
| 3. | 3 | 4 | 2 | 1 |
| 4. | 1 | 2 | 3 | 4 |
An anionic detergent among the following is/are:
| 1. | Sodium salts of sulphonated long-chain alcohols. |
| 2. | Ester of stearic acid and polyethylene glycol. |
| 3. | Quaternary ammonium salt of the amine with acetate ion. |
| 4. | Sodium salts of sulphonated long-chain hydrocarbons. |
1. a and b
2. a and c
3. a and d
4. b and d
Choose the correct statement:
| 1. | Detergents that can not be degraded by bacteria are called biodegradable detergents. |
| 2. | Biodegradable detergents have straight hydrocarbon chains. |
| 3. | Detergents that can be degraded by bacteria are called non-biodegradable detergents. |
| 4. | Biodegradable detergents have highly branched hydrocarbon chains. |
Soaps do not work in hard water because:
| 1. | Calcium and magnesium ions displace sodium or potassium from their salts and form insoluble calcium or magnesium salts of fatty acids. |
| 2. | Sodium or potassium ions displace calcium and magnesium from their salts and form insoluble calcium or magnesium salts of fatty acids. |
| 3. | Calcium and magnesium ions displace sodium or potassium from their salts and form insoluble sodium or potassium salts of fatty acids. |
| 4. | None of the above. |
The correct statement among the following is:
| a. | Cationic detergents have germicidal properties. |
| b. | Bacteria can degrade the detergents containing highly branched chains. |
| c. | Some synthetic detergents can give foam even in ice-cold water. |
| d. | Synthetic detergents are not soaps. |
1. a, c and d
2. a, b and c
3. b and c
4. c and d
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