Soaps were originally made from___________ .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

_________ gas causes tears in our eyes while cutting onions.

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Propane thiols oxide

Water, coconut oil and __________ are necessary for soap preparation.

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Sodium hydroxide

____________ is called as farmer’s best friend.

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Earthworm

___________ fertilizer is ecofriendly.

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Natural (Organic)

_________ is an example for natural adhesive.

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Starch

Give an example for inorganic fertilizer.

Mention any three physical properties of phenol.

Explain the uses of plaster of paris.

Why earthworm is called as farmer’s friend?

Explain the process of manufacturing cement.

What are uses of Gypsum?

How are detergents manufactured?