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1 Chemistry MCQs

Which is the heaviest naturally occurring element?

  • Radium
  • Platinum
  • Uranium
  • Cadmium
0 Comments
Correct Answer: C. Uranium

Explanation:

The heaviest naturally occurring element on Earth is Uranium (U). It has an ... Read More Details

2 Chemistry MCQs

Which is the heaviest man-made element discovered so far?

  • Promethium
  • Ununoctium (Oganesson)
  • Francium
  • Technetium
0 Comments
Correct Answer: B. Ununoctium (Oganesson)

Explanation:

The heaviest man-made element discovered so far is Oganesson (Og), which was formerly ... Read More Details

3 Physics MCQs

Which instrument is used for viewing or observing the Sun?

  • Stroboscope
  • Heliograph
  • Solograph
  • None of these
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Correct Answer: B. Heliograph

Explanation:

A heliograph is an instrument primarily used for observing, recording, or communicating using ... Read More Details

4 Chemistry MCQs

Which of the following is a strong-smelling agent added to LPG cylinders to help detect gas leakage?

  • Nitrogen Peroxide
  • Ethyl Mercaptan
  • Carbon Monoxide
  • Sulphur Dioxide
0 Comments
Correct Answer: B. Ethyl Mercaptan

Explanation:

Liquefied Petroleum Gas (LPG) is widely used as a fuel for domestic, commercial, ... Read More Details

5 Biology Mcqs

A crescograph is a device used to measure the growth of ?

  • Microorganisms
  • Plants
  • Humans
  • Pollution
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Correct Answer: B. Plants

Explanation:

A crescograph is a scientific device used to measure the rate of growth ... Read More Details

6 Physics MCQs

Which of the following is used in water purification?

  • Osmosis
  • Reverse Osmosis
  • Cytolysis
  • Turgor PressureReverse Osmosis (RO) is a widely used and highly efficient process for water purification. It works on the principle of osmosis but in the opposite direction. In natural osmosis, water moves from a region of lower solute concentration to a
0 Comments
Correct Answer: B. Reverse Osmosis

Explanation:

Reverse Osmosis (RO) is a widely used and highly efficient process for water ... Read More Details

7 Chemistry MCQs

Which is the lightest metal?

  • Lithium
  • Sodium
  • Magnesium
  • Aluminium
0 Comments
Correct Answer: A. Lithium

Explanation:

The lightest metal known is lithium (Li). It is the first metal in ... Read More Details

8 Environmental Science MCQs

Which of the following water pollutants causes Minamata disease?

  • Methyl Mercury
  • Lead
  • Salmonella
  • Perchlorate
0 Comments
Correct Answer: A. Methyl Mercury

Explanation:

Minamata disease is a severe neurological disorder caused by the consumption of fish ... Read More Details

9 Environmental Science MCQs

What is the process of converting wet waste into manure called?

  • Metabolism
  • Conservation
  • Incineration
  • Composting
0 Comments
Correct Answer: D. Composting

Explanation:

Composting is the natural process of converting wet organic waste such as vegetable ... Read More Details

10 Biology Mcqs

Which of the following organisms releases molecular oxygen (O₂) into water?

  • E. coli
  • Phytoplankton
  • Amoeba
  • Salmonella
0 Comments
Correct Answer: B. Phytoplankton

Explanation:

Phytoplankton are microscopic plant-like organisms that float near the surface of oceans, lakes, ... Read More Details