MCQs on Soap And Detergents surface-active agents

SOAP AND DETERGENTS

 

Which does not react with sodium hydroxide solution?

  1. Fat
  2. Vinegar
  3. Benzene
  4. Carbon dioxide

Benzene

 

Which type of organic compound does fat belong to?

  1. Alkene
  2. Alkanoic acid
  3. Alkanol
  4. Ester

Ester

 

In the process of production of soap, the soap can be salted out by adding

  1. Concentrated potassium hydroxide solution.
  2. Concentrated sulphuric acid.
  3. Concentrated sodium chloride solution.
  4. Concentrated magnesium sulphate solution.

Concentrated potassium hydroxide solution

 

What is the use of the addition of brine solution in the production of soap from castor oil and sodium hydroxide?

  1. To speed up the reaction
  2. To lower the solubility of soap
  3. To increase the purity of the soap obtained
  4. To remove unreacted castor oil and sodium hydroxide

To remove unreacted castor oil and sodium hydroxide

 

 

Soap and detergents eliminate the dirt fromclothes due to which of the following?

  1. Lowering of interfacial tension
  2. Gravity
  3. Osmosis
  4. Capillary action

Lowering of interfacial tension

 

The green color of water in a lake is because of ______.

  1. Excessive growth of sea weeds
  2. Pollution
  3. Algae
  4. Grass

Algae

 

 

When a drop of detergent solution is added onto a clean towel, it spreads instead of existing as a droplet. Which of the following statements describes this phenomenon?

  1. Detergent acts as an emulsifying agent.
  2. Detergent reduces the viscosity of water.
  3. Detergent reduces the density of water.
  4. Detergent reduces surface tension of water.

Detergent reduces surface tension of water

 

SDS is an example of which of the following?

  1. Anionic surfactants.
  2. Cationic surfactant.
  3. Non-ionic surfactants.
  4. None of these.

Anionic surfactants.

 

 

Which factors determine the property of soap?

  1. Formulation
  2. Fatty acid chain length
  3. Saturation/unsaturation
  4. All of these

All of these

 

 

Which fatty acids is not present in Tallow/animal fat?

  1. Steric acid
  2. Lauric acid
  3. Linoleic acid
  4. Palmitic acid

Lauric acid

 

Which of the following is the reaction of oils/fats with sodium hydroxide ?

  1. Reduction
  2. Esterification
  3. Hydrolysis
  4. Saponification

Saponification

 

Which of the following are the major industrial applications of glycerol?

  1. It is used in production of alkyl resins
  2. Cosmetics and adhesives
  3. It is used in production of polyurethanes
  4. All of above

All of above

 

Which substances is/areadded as binders?

  1. Dextrin
  2. Talcum powder
  3. Starches
  4. All of above

All of above

 

Soap is a salt of which compound?

  1. Amino acid
  2. Acetic acid
  3. Formic acid
  4. Fatty acid

Fatty acid

 

During the preparation of soap, the liquid separated by distillation is known as _____.

  1. Ethanol
  2. Glycerol
  3. Methanol
  4. Sodium hydroxide

Glycerol

Which statements is true with respect to builders?

  1. Soften water
  2. Enhance the cleaning efficiency
  3. Disperse and suspend soil
  4. All of these

All of these

 

Which substances are helpful as builders?

  1. Zeolites
  2. Sodium silicates
  3. Sodium sulfate
  4. All of these

All of these

 

Which enzymes are helpful in detergents?

  1. Celluloses
  2. Lipases
  3. Proteases
  4. All of these

All of these

 

 

Which fatty acids are used in soap manufacturing?

  1. Oleic acid
  2. Linoleic acid
  3. Steric acid
  4. All of these

All of these

 

Which of the following are the substances which lower the surface tension of water?

.A. Surface active agents

  1. Surfactants
  2. Detergents
  3. All of above

All of above

 

Which are anionic detergents?

  1. Sodium salts of sulfonated long chain hydrocarbons
  2. Ester of stearic acid and polyethylene glycol.
  3. Sodium salts of sulfonated long chain alcohol.
  4. Quaternary ammonium salt of amine with acetate ion.

Sodium salts of sulfonated long chain alcohol

 

Soft soap is made from _________ and fatty acids.

  1. KOH
  2. NaOH
  3. LiOH
  4. All of these

KOH

 

Which fatty acids are present in palm kernel oil?

  1. Palmitic acid
  2. Linoleic acid
  3. Steric acid
  4. All of these

All of these

 

Which fatty acids is not present in coconut oil?

  1. Linoleic acid
  2. Palmitic acid
  3. Steric acid
  4. Lauric acid

Linoleic acid

 

 

Soapy detergents and soap less detergent behave differently in hard water because they

  1. Have different pH values.
  2. Have different hydrophobic hydrocarbon chains.
  3. Have different hydrophilic heads.
  4. Are made by different chemical methods.

Have different hydrophilic heads

 

Each fat or oil is prepared with which of the following?

  1. A distinctive mixture of several aldehydes.
  2. A distinctive mixture of several different triglycerides
  3. Mixture of above both.
  4. None of above.

A distinctive mixture of several different triglycerides

 

What is caustic potash?

  1. NaCl
  2. NaBH4
  3. NaOH
  4. KOH

KOH

 

The soap and detergents are source of organic pollutants like:

  1. Polyphosphates
  2. Sulphonated hydrocarbons
  3. Glycerol
  4. All of these

All of these

 

__________ is best in its cleaning action.

  1. Soap
  2. Surfactant
  3. Detergents
  4. None of these

Detergents

 

Turpentine is obtained from ___.

  1. Pine tree
  2. Oak tree
  3. Birch tree
  4. Lemon tree

Pine tree

 

________ surfactants perform well over a wide range of water hardness and pH.

  1. Anionic
  2. Nonionic
  3. Cationic
  4. none of these

Nonionic

 

Washing soap can be prepared by sponification with alkali and of the following oil.

  1. Kerosene oil
  2. Paraffin oil
  3. Rose oil
  4. Groundnut oil

Groundnut oil

 

CTAB is an example of which of the following?

  1. Anionic surfactant
  2. Non-ionic surfactant
  3. Cationic surfactant
  4. None of these

Cationic surfactant

 

Triton-31, an example of —-

  1. Cationic surfactant
  2. Anionic surfactant
  3. Non-ionic surfactant
  4. None of these

Non-ionic surfactant

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