Everyday Science · Everyday & Industrial Chemistry · page 5 of 21

Household MCQs with Answers

Includes 23 past paper MCQs (marked).

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Household, Food & Material Chemistry MCQs (41–50)

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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41.
What is the type of water called that produces good lather with soap?
Correct Answer: C. Soft water
One-liner
Water that produces good lather with soap is called soft water.
42.
A polymer may be ?
Correct Answer: D. All of these
One-liner
A polymer may be All of these — natural, synthetic, or semi-synthetic.
43.
Water containing calcium and phosphate is called _?
Correct Answer: C. Temporary hard water
One-liner
Water containing calcium and phosphate is called temporary hard water.
44.
If nitrogen is the main element of fertilizers, then fertilizers are classified as ?
Correct Answer: D. Nitrogenous fertilizers
One-liner
Fertilizers in which nitrogen is the main element are classified as Nitrogenous fertilizers.
45.
Agrochemicals used in agriculture are commonly called ?
Correct Answer: C. Both A and B
One-liner
Agrochemicals used in agriculture are commonly called Both A and B (Pesticides and Fertilizers).
46.
Past Paper MCQ
How many carats is the best gold?
Correct Answer: B. 24 Carat
One-liner
The best (purest) gold is 24 Carat, which is 99.9% pure gold.
47.
Which of the following is not a fatty acid?
Correct Answer: C. Phthalic acid
One-liner
<b>Phthalic acid</b> is not a fatty acid; it is an aromatic dicarboxylic acid used in the production of plastics and dyes.
48.
The following are the methods to purify water except?
Correct Answer: C. Crystallization
One-liner
Crystallization is not a method of water purification; it is a technique used to obtain pure solid crystals from a solution.
49.
For dealing with chemicals, which of the following gloves are used?
Correct Answer: B. Rubber gloves
One-liner
For dealing with chemicals, rubber gloves are used because rubber is chemically resistant and provides a protective barrier.
50.
To clean the ice from the roads during winter season, which of the following is used?
Correct Answer: A. Salt
One-liner
Salt is used to clean ice from roads during winter because it lowers the freezing point of water, causing ice to melt.

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Household MCQs with Answers

Household, Food & Material Chemistry MCQs (41–50)

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