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1 Biology Mcqs

What is the main role of salt in the human diet?

  • Ease the process of cooking
  • Increase the taste
  • Produce small amount of hydrochloric acid required for digestion
  • Increase solubility of food particles in water
0 Comments
Correct Answer: C. Produce small amount of hydrochloric acid required for digestion

Explanation:

Salt, scientifically known as sodium chloride (NaCl), is an essential part of the ... Read More Details

2 Physics MCQs

How many kilograms are there in 1 tonne?

  • 100
  • 400
  • 1000
  • 4000
0 Comments
Correct Answer: C. 1000

Explanation:

The tonne is a metric unit of mass commonly used to measure large ... Read More Details

3 Chemistry MCQs

What is the chemical name of chalk?

  • Sodium nitrate
  • Zinc sulfate
  • Sulphuric acid
  • Calcium carbonate
0 Comments
Correct Answer: D. Calcium carbonate

Explanation:

Chalk is a soft, white, porous sedimentary rock commonly used for writing on ... Read More Details

4 Biology Mcqs

Which option is considered a biological tissue?

  • Blood
  • Lungs
  • Kidney
  • Pancreas
0 Comments
Correct Answer: A. Blood

Explanation:

In biology, a tissue is a group of similar cells that perform a ... Read More Details

5 Environmental Science MCQs

Which gas is not a greenhouse gas?

  • Methane
  • Nitrous oxide
  • Carbon dioxide
  • Hydrogen
0 Comments
Correct Answer: D. Hydrogen

Explanation:

Greenhouse gases are compounds in the atmosphere that trap heat from the sun, ... Read More Details

6 Chemistry MCQs

Which gases are commonly used in welding?

  • Oxygen and hydrogen
  • Oxygen, hydrogen, acetylene and nitrogen
  • Oxygen, acetylene and argon
  • Oxygen and acetylene
0 Comments
Correct Answer: D. Oxygen and acetylene

Explanation:

Welding is a process used to join metals by melting them together. One ... Read More Details

7 Chemistry MCQs

What is potassium nitrate mainly used for?

  • Medicine
  • Fertilizer
  • Salt
  • Glass
0 Comments
Correct Answer: B. Fertilizer

Explanation:

Potassium nitrate (KNO₃) is a chemical compound widely used in agriculture and industry. ... Read More Details

8 Environmental Science MCQs

Which metal causes air pollution in big cities?

  • Copper
  • Chromium
  • Lead
  • Cadmium
0 Comments
Correct Answer: C. Lead

Explanation:

Air pollution in big cities is a serious environmental problem, and certain metals ... Read More Details

9 Biology Mcqs

What color do we usually see when our eyes are closed?

  • Black
  • Grey
  • Eigengrau
  • None of these
0 Comments
Correct Answer: A. Black

Explanation:

When we close our eyes in the dark, many people assume that what ... Read More Details

10 Physics MCQs

Why does a bird sitting on a high-voltage electric wire not get electrocuted?

  • It has high resistance
  • The body is earthed
  • It does not form a closed path for the flow of current
  • Its feet are good insulators
0 Comments
Correct Answer: C. It does not form a closed path for the flow of current

Explanation:

When a bird perches on a high-tension electric wire, it does not get ... Read More Details

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