Chemistry in Everyday life Book Back Questions & Answers

1. Soaps were originally made from ___________ .

a. proteins

b. animal fats and vegetable oils

c. chemicals extracted from the soil

d. foam booster

Correct answer: b. animal fats and vegetable oils

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2. 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

Correct answer: b. Sodium hydroxide

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3. Gypsum is added to the cement for ______________________.

a. fast setting

b. delayed setting

c. hardening

d. making paste

Correct answer: b. delayed setting

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4. Phenol is ________________.

a. carbolic acid

b. acetic acid

c. benzoic acid

d. hydrochloric acid

Correct answer: a. carbolic acid

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5. Natural adhesives are made from ___________.

a. Protein

b. fat

c. starch

d. vitamins

Correct answer: c. starch

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1. ______________ gas causes tears in our eyes while cutting onions.

Correct answer: Propanethial-s-oxide

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

Correct answer: animal fat

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3. ____________ is called as farmers best friend.

Correct answer: Earthworm

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4. ___________ fertilizer is ecofriendly.

Correct answer: Organic

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5. _____________ is an example for natural adhesive.

Correct answer: Starch dissolved in water

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1. Concentrated phenol is used as a disinfectant.

Correct answer: False

Correct Statement: Low concentrated phenol is used as a disinfectant.

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2. Gypsum is largely used in medical industries.

Correct answer: False

Correct Statement: Gypsum is largely used in cement preparation

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3. Plaster of Paris is obtained from heating gypsum.

Correct answer: True

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4. Adhesives are the substances used to separate the components.

Correct answer: False

Correct Statement: Adhesives are the substances used to join the components

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5. NPK are the primary nutrients for plants.

Correct answer: True

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1. Soap

Correct answer: NaOH

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2. Cement

Correct answer: RCC

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3. Fertilizers

Correct answer: NPK

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4. Gypsum

Correct answer: CaSO4.2H2O

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5. Phenol

Correct answer: C6H5 OH

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1. Urea : Inorganic fertilizer: Vermi compost: ____________.

Correct answer: Organic fertilizer

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2. _____________: Natural adhesives: Cello tape: Artificial adhesives.

Correct answer: Starch dissolved in water

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