Soaps were originally made from___________ .

(a)

proteins

(b)

animal fats and vegetable oils

(c)

chemicals extracted from the soil

(d)

foam booster

The saponification of a fat or oil is done using _______________ solution for hot process.

(a)

Potassium hydroxide

(b)

Sodium hydroxide

(c)

Hydrochloric acid

(d)

Sodium chloride

Gypsum is added to the cement for_______.

(a)

fast setting

(b)

delayed setting

(c)

hardening

(d)

making paste

Phenol is ______.

(a)

carbolic acid

(b)

acetic acid

(c)

benzoic acid

(d)

hydrochloric acid

Natural adhesives are made from ________.

(a)

Protein

(b)

fat

(c)

starch

(d)

vitamins