Everyday Science · Everyday & Industrial Chemistry · page 2 of 21

Household MCQs with Answers

Includes 23 past paper MCQs (marked).

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Household, Food & Material Chemistry MCQs (11–20)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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11.
Butter is an example of which type of solution?
Correct Answer: A. Liquid-Solid
One-liner
Butter is an example of a Liquid-Solid solution, where liquid (water/fat) is the solvent and solid (fat crystals) is the solute.
12.
Tincture of iodine is _?
Correct Answer: C. Iodine in alcohol
One-liner
Tincture of iodine is iodine in alcohol (specifically an alcoholic solution of iodine, typically 2–7% iodine dissolved in ethanol).
13.
Past Paper MCQ
What is the approximate percentage of water in carbonated drinks?
Correct Answer: C. 92%
One-liner
Carbonated drinks contain approximately 92% water by volume.
14.
The main enzyme used to make cheese is _?
Correct Answer: B. Rennet
One-liner
The main enzyme used to make cheese is Rennet.
15.
Which chemical is used in the manufacture of foam for mattresses and cushions?
Correct Answer: C. Phenol
One-liner
Phenol is the chemical used in the manufacture of foam for mattresses and cushions.
16.
Mayonnaise is an emulsion of?
Correct Answer: A. Oil in water
One-liner
Mayonnaise is an emulsion of oil in water, where tiny oil droplets are dispersed throughout a continuous water phase (from egg yolk).
17.
Preservatives are used to preserve _?
Correct Answer: A. Food
One-liner
Preservatives are used to preserve food by preventing spoilage from microorganisms, oxidation, and enzymatic reactions.
18.
Which chemical is commonly used in household bleach?
Correct Answer: A. Sodium hypochlorite
One-liner
Household bleach commonly contains sodium hypochlorite as its active ingredient.
19.
Tincture of Iodine is an antiseptic, made up of iodine and it dissolves in ?
Correct Answer: B. Alcohol
One-liner
Tincture of Iodine is an antiseptic solution in which iodine is dissolved in alcohol (ethanol).
20.
Washing powders are a combination of soap, detergents and other chemical agents. A washing powder fails to keep dirt suspended in water after removal. Which ingredient is most likely missing?
Correct Answer: B. Carboxy methyl cellulose
One-liner
Carboxy methyl cellulose (CMC) is the ingredient in washing powders that acts as an anti-redeposition agent, keeping dirt suspended in water after removal.

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Household MCQs with Answers

Household, Food & Material Chemistry MCQs (11–20)

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