Soaps & Detergents Multiple Choice Questions and Answers

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1. Which of the following chemical is added in washing powder for keeping it dry?
  1. Sodium silicate
  2. Inorganic phosphate
  3. Carboxy-methyl cellulose
  4. Sodium perborate

Answer: Sodium silicate

2. Which type of detergent is more biodegradable and environmentally friendly?
  1. Anionic detergents
  2. Cationic detergents
  3. Nonionic detergents
  4. Amphoteric detergents

Answer: Nonionic detergents

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3. What is the primary function of soap and detergent molecules in cleaning processes?
  1. Emulsifying oils and grease
  2. Enhancing water hardness
  3. Increasing surface tension
  4. Generating foam

Answer: Emulsifying oils and grease

4. Soft soaps are the limitation of hot process because of their ____________
  1. High alkalinity
  2. Low alkalinity
  3. Low solubility in water
  4. High solubility in water

Answer: High solubility in water

5. Detergents are synthetic soaps like cleansing agents and are also known as ____________
  1. Artifacts
  2. Detritus
  3. Syndets
  4. Collagen

Answer: Syndets

6. If the carbon chain is highly branched, the corresponding detergent will be ____________
  1. Soft and biodegradable
  2. Soft and non-biodegradable
  3. Hard and biodegradable
  4. Hard and non-biodegradable

Answer: Hard and non-biodegradable

7. Which of the following is a characteristic of surfactants, the key components of soaps and detergents?
  1. Low boiling point
  2. High surface tension
  3. Hydrophilic and hydrophobic regions
  4. Insolubility in water

Answer: Hydrophilic and hydrophobic regions

8. Which of the following is a common use of cationic detergents?
  1. Laundry detergents
  2. Dishwashing detergents
  3. Fabric softeners
  4. All-purpose cleaners

Answer: Fabric softeners

9. What is the primary reason for the widespread use of detergents over traditional soap in modern cleaning products?
  1. Lower cost
  2. Greater environmental compatibility
  3. Improved performance in hard water
  4. Enhanced antimicrobial properties

Answer: Improved performance in hard water

10. The saponification of a fat or oil is done using _______________ solution for hot process.
  1. KOH
  2. NaOH
  3. HCl
  4. NaCl

Answer: NaOH

11. Which of the following is a typical soap molecule?
  1. Calcium stearate
  2. Potassium permanganate
  3. Sodium bicarbonate
  4. Sodium stearate

Answer: Sodium stearate

12. Which of the following is also known as invert detergents?
  1. Anionic detergents
  2. Cationic detergents
  3. Non-ionic detergents
  4. All detergents comes in the category of invert detergents

Answer: Cationic detergents

13. Which of the following is an example of cationic detergent?
  1. Alkyltrimethyl ammonium chloride
  2. Sodium salts of alkyl sulphates
  3. Sodium salts of alkyl benzene sulphonic acids
  4. Polyethers

Answer: Alkyltrimethyl ammonium chloride

14. The % weight of detergent in washing powders is ____________
  1. 5 – 10
  2. 50 – 70
  3. 15 – 30
  4. 30 – 45

Answer: 15 – 30

15. What is the primary difference between soaps and detergents?
  1. Soaps are synthetic, while detergents are natural.
  2. Soaps are more effective in hard water, while detergents are not.
  3. Soaps are derived from animal fats, while detergents are synthetic compounds.
  4. Soaps are solid, while detergents are liquid.

Answer: Soaps are derived from animal fats, while detergents are synthetic compounds.

16. How do detergents differ from soaps in terms of performance in hard water?
  1. Detergents become less effective, while soaps remain effective.
  2. Soaps become less effective, while detergents remain effective.
  3. Both detergents and soaps become less effective.
  4. Neither detergents nor soaps are affected by hard water.

Answer: Soaps become less effective, while detergents remain effective.

17. Which property of soaps and detergents enables them to reduce the surface tension of water?
  1. Hydrophobicity
  2. Ionization
  3. Surfactant action
  4. Polymerization

Answer: Surfactant action

18. The saponification of a fat or oil is done using _______________ solution for cold process.
  1. KOH
  2. NaOH
  3. HCl
  4. NaCl

Answer: KOH

19. Select the correct statement from the following options.
  1. The soap micelle is unstable due to positive charge on its head
  2. The soap micelle is stable due to positive charge on its head
  3. The soap micelle is unstable due to negative charge on its head
  4. The soap micelle is stable due to negative charge on its head

Answer: The soap micelle is stable due to negative charge on its head

20. Which of the following is an example of non-ionic detergent?
  1. Alkyltrimethyl ammonium chloride
  2. Sodium salts of alkyl sulphates
  3. Sodium salts of alkyl benzene sulphonic acids
  4. Polyethers

Answer: Polyethers

21. Which of the following chemical is added in washing powder for keeping the dirt suspended in water?
  1. Sodium silicate
  2. Inorganic phosphate
  3. Carboxy-methyl cellulose
  4. Sodium perborate

Answer: Carboxy-methyl cellulose

22. How do anionic detergents differ from cationic detergents in terms of their electrical charge?
  1. Anionic detergents have a positive charge, while cationic detergents have a negative charge.
  2. Anionic detergents have a negative charge, while cationic detergents have a positive charge.
  3. Both anionic and cationic detergents have a negative charge.
  4. Both anionic and cationic detergents have a positive charge.

Answer: Anionic detergents have a negative charge, while cationic detergents have a positive charge.

23. Which property of soap molecules allows them to form micelles in water?
  1. Hydrophilic head
  2. Hydrophobic tail
  3. Ionic charge
  4. Aromatic ring structure

Answer: Hydrophobic tail

24. Soaps are _____________ based soapy detergents.
  1. Water
  2. Kerosene
  3. Oil
  4. Acid

Answer: Oil

25. If the carbon chain is linear, the corresponding detergent will be ____________
  1. Soft and non-biodegradable
  2. Soft and biodegradable
  3. Hard and biodegradable
  4. Hard and non-biodegradable

Answer: Soft and biodegradable

26. Which of the following is the residual product in the formation of soap?
  1. Glyceraldehyde
  2. Glycerol
  3. Glycerine
  4. Acrylonitrile

Answer: Glycerol

27. Select the incorrect statement from the following option.
  1. Hard soaps are the sodium carboxylates
  2. Soft soaps are potassium carboxylates
  3. Hard soaps are manufactured by cold process
  4. Example of soft soap – shampoo and shaving cream

Answer: Hard soaps are manufactured by cold process

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