Advantages of detergent

Which of the following is an advantage of detergents over soap?

• a) Biodegradability

• b) Hard water insolubility

• c) Harsh on skin

• d) Environmentally unfriendly

Detergents are preferred over soap in hard water because:

• a) They form insoluble precipitates

• b) They form soluble complexes with calcium and magnesium ions

• c) They react with metals to form salts

• d) They enhance water hardness

Which of the following statements is true regarding the cleaning action of detergents?

• a) They leave a scum residue on surfaces

• b) They have a limited ability to remove oily stains

• c) They emulsify oily stains, allowing them to be washed away

• d) They increase water's surface tension

Compared to soap, detergents are less likely to cause:

• a) Skin irritation

• b) Biodegradation

• c) Hard water scaling

• d) Environmental pollution

Detergents have the advantage of being effective in both:

• a) Acidic and basic solutions

• b) Acidic and neutral solutions

• c) Basic and alkaline solutions

• d) Basic and neutral solutions