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.
Subtopic:  Soaps & Detergents, Dyes & Propellant |
 71%
From NCERT
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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.
Subtopic:  Soaps & Detergents, Dyes & Propellant |
 70%
From NCERT
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Detergents are preferred over soap for cleaning clothes because -
1. Detergents form soluble salts.
2. Detergents form insoluble salts.
3. Soaps form soluble salts.
4. Soaps form insoluble salts of potassium.

Subtopic:  Soaps & Detergents, Dyes & Propellant |
 65%
From NCERT
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The correct statement among the following regarding cationic detergent is/are:

1. These are sodium salts of long chain alcohols or alkylbenzenesulphonic acids.
2. Sodium 4-(1-dodecyl) benzenesulphonate (SDS) is an example of an anionic detergent.
3. These are quaternary ammonium salts of acetates, chlorides, or bromides of amine.
4. None of the above.
Subtopic:  Soaps & Detergents, Dyes & Propellant |
 70%
From NCERT
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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)
Subtopic:  Soaps & Detergents, Dyes & Propellant |
 80%
From NCERT
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NEET 2025 - Target Batch
Hints
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NEET 2025 - Target Batch