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1 Physical Chemistry MCQs

The effective volume in gas calculations is usually taken for how many moles of gas?

  • 2 moles of gas
  • 1 mole of gas
  • 5 moles of gas
  • 3 moles of gas
0 Comments
Correct Answer: B. 1 mole of gas

Explanation:

In physical chemistry, the concept of effective volume is commonly used in gas ... Read More Details

2 Inorganic Chemistry MCQs

In the whole periodic table, which element is the strongest reducing agent?

  • Chlorine
  • Lithium
  • Helium
  • Neon
0 Comments
Correct Answer: B. Lithium

Explanation:

A reducing agent is a substance that donates electrons to another substance during ... Read More Details

3 Environmental Chemistry MCQs

Which compound is responsible for destroying the ozone layer?

  • CFCs
  • CH₃COOH
  • Both A & B
  • None of these
0 Comments
Correct Answer: A. CFCs

Explanation:

The ozone layer is a protective layer in the Earth's stratosphere that absorbs ... Read More Details

4 Physical Chemistry MCQs

A scale used to measure the hydrogen ion concentration in a solution is known as ?

  • Thermometer
  • Viscometer
  • pH Scale
  • Stagmometer
0 Comments
Correct Answer: C. pH Scale

Explanation:

The pH scale is a scientific tool used to measure the hydrogen ion ... Read More Details

5 Biology Mcqs

Which of the following is an example of globular proteins?

  • Peptide
  • Enzymes
  • Primary protein
  • Secondary protein
0 Comments
Correct Answer: B. Enzymes

Explanation:

Proteins are complex biomolecules composed of amino acids and play vital roles in ... Read More Details

6 Physical Chemistry MCQs

When ammonia is used as a refrigerant in a vapor compression cycle, which type of tubing is preferred?

  • Copper tubing
  • Steel tubing
  • Both A & B
  • Material does not matter for the refrigerant
0 Comments
Correct Answer: B. Steel tubing

Explanation:

Ammonia (NH₃) is a widely used refrigerant in vapor compression cycles due to ... Read More Details

7 Organic Chemistry MCQs

The solution that remains after crystals have formed is called what?

  • Mother liquor
  • Dilute solution
  • Residue
  • Both A & B
0 Comments
Correct Answer: A. Mother liquor

Explanation:

In crystallization, a common method for purifying solid compounds, crystals form from a ... Read More Details

8 Organic Chemistry MCQs

Which of the following is an artificial man-made fiber?

  • Boron
  • Saffron
  • Rayon
  • None of these
0 Comments
Correct Answer: C. Rayon

Explanation:

Artificial or man-made fibers are fibers produced from chemical substances rather than obtained ... Read More Details

9 Biology Mcqs

According to the Journal of Biological Chemistry (Vol. 158), what percentage of water is found in the human brain and heart?

  • 75%
  • 81%
  • 73%
  • 89%
0 Comments
Correct Answer: C. 73%

Explanation:

Water is a major component of the human body and is essential for ... Read More Details

10 Inorganic Chemistry MCQs

Carbon, Diamond, and Graphite are collectively called what?

  • Allotropes
  • Isomers
  • Isomorphs
  • Isotopes
0 Comments
Correct Answer: A. Allotropes

Explanation:

Carbon exists in several forms with different physical structures but the same chemical ... Read More Details