Chemistry

Which of the following is true?

• Dandruff is contagious

• Dandruff results from a decreased rate of cell turnover

• Dandruff appear only in dry hair

• Antidandruff shampoos are common shampoos with active ingredients

The following describes the properties of a good cleaning agent EXCEPT;

• The agent makes close contact with the surface to be cleaned.

• The ability to remove the dirt into the bulk of the liquid or to assist this process.

• The ability to redeposit dirt on the surface to be cleaned.

• The ability to solubilize or disperse the dirt.

Which of the following wavelengths do fluorescent brightening agents primarily absorb?

• Visible light

• Gamma rays

• Ultraviolet (UV) light

• Infrared light

How a conditioner works to provide hair manageability?

I Decreasing static electricity

II Increasing sebum

III Reducing friction among hair fibres

IV Reducing dandruff

• I, and III only

• II only

• II and IV only

• I and IV only

The following statements are true about detergents EXCEPT;

• Detergents do not precipitate in hard water or acidic solutions.

• Detergents have complex formulations.

• Detergents can have more than one type of surfactant.

• The surfactant in detergent has carboxylate group.

What type of dye is typically used for wool and silk due to its affinity for protein fibers?

• Acid dye

• Basic dye

• Direct dye

• Vat dye

Identify the FALSE statement related to hair shampoos.

• Cationic surfactant has a high affinity for hair fibre and it reduces the frizz effect.

• Soap is a common anionic surfactant in hair shampoos.

• Non-ionic surfactant is not so effective at removing dirt and sebum but leave the hair

  more manageable.

• Amphoteric surfactant is less irritating to eyes.

Below are the major components of detergents ECXEPT;

• Additives

• Surfactants

• Bleaching agents

• Formers

Which type of dye is used primarily for synthetic fibers, such as polyester?

• Acid dye

• Disperse dye

• Reactive dye

• Direct dye

___________ is a common bleachant used to remove natural or synthetic colour from

hair.

• Sodium hydroxid

• Ethanolamine

• Ammonium hydroxide

• Hydrogen oxide