Why is carbon used in the purification of drinking water?

C. It removes odors and impurities

A. It adds essential minerals to water

B. It kills bacteria and viruses

C. It removes odors and impurities

Esters are commonly used as?

A. Flavouring agents & perfumes

Everyday Science · Everyday & Industrial Chemistry · page 18 of 21

Household MCQs with Answers

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Household, Food & Material Chemistry MCQs (171–180)

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Past paper MCQs in this chapter · See all past papers

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171.
Why is carbon used in the purification of drinking water?
Correct Answer: C. It removes odors and impurities
One-liner
Carbon (activated charcoal) is used in water purification because it removes odors and impurities through adsorption.
172.
Which element is commonly used in beauty parlours for hair setting?
Correct Answer: C. Sulphur
One-liner
Sulphur is commonly used in beauty parlours for hair setting because it is a key component of hair perming and straightening solutions.
173.
Past Paper MCQ
can be manufactured using wood.
Correct Answer: A. Paper
One-liner
Paper can be manufactured using wood.
174.
Which element is commonly added to drinking water as an additive?
Correct Answer: B. Fluorine
One-liner
Fluorine (in the form of fluoride) is commonly added to drinking water to prevent tooth decay.
175.
Esters are commonly used as?
Correct Answer: A. Flavouring agents & perfumes
One-liner
Esters are commonly used as flavouring agents and perfumes due to their pleasant, fruity odours.
176.
Soft water is used in?
Correct Answer: D. Both B and C
One-liner
Soft water is used in both boilers/steam engines and laundry/washing because it does not form scale or scum.
177.
Air Freshener is an example of _?
Correct Answer: D. Artificial Aerosol
One-liner
Air freshener is an example of Artificial Aerosol.
178.
What type of chemicals are responsible for the pleasant smell of perfumes?
Correct Answer: A. Esters
One-liner
The pleasant smell of perfumes is primarily due to chemicals called Esters.
179.
Which of the following sugar molecules are condensed to produce sucrose?
Correct Answer: A. Glucose & fructose
One-liner
Sucrose is a disaccharide formed by the condensation of glucose and fructose molecules.
180.
_ is one of the most common chemical food preservatives.
Correct Answer: A. Sodium Benzoate
One-liner
Sodium Benzoate is one of the most common chemical food preservatives used to inhibit microbial growth in acidic foods.

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Household MCQs with Answers

Household, Food & Material Chemistry MCQs (171–180)

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