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1 Chemistry MCQs

What is the chemical formula of Sodium Carbonate?

  • Na₃CO₂
  • CNa₂O₃
  • Na₂CO₃
  • Na₃CO₃
0 Comments
Correct Answer: C. Na₂CO₃

Explanation:

Sodium Carbonate (Na₂CO₃) is an important inorganic compound widely used in both industrial ... Read More Details

2 Chemistry MCQs

A mixture of sand and naphthalene can be separated by which method?

  • Chromatography
  • Fractional distillation
  • Sublimation
  • None of these
0 Comments
Correct Answer: C. Sublimation

Explanation:

The separation of a mixture of sand and naphthalene is a ... Read More Details

3 Physics MCQs

Who first introduced the M.K.S. system of units?

  • Giorgi
  • Archimedes
  • Einstein
  • Newton
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Correct Answer: A. Giorgi

Explanation:

The M.K.S. system of units stands for Meter–Kilogram–Second, representing the fundamental physical quantities ... Read More Details

4 Chemistry MCQs

What is the chemical formula of Sulfuric Acid?

  • C₂H₆O
  • CaSO
  • C₂H₄O₂
  • H₂SO₄
0 Comments
Correct Answer: D. H₂SO₄

Explanation:

Sulfuric acid (H₂SO₄) is one of the most important and widely used inorganic ... Read More Details

5 Biology Mcqs

Which of the following is a diverse group of hydrophobic molecules?

  • Carbohydrates
  • Lipids
  • Proteins
  • Nucleic acids
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Correct Answer: B. Lipids

Explanation:

Lipids are a broad and diverse group of biological molecules that are hydrophobic ... Read More Details

6 Biology Mcqs

What is the molecular formula of Glucose?

  • C₄H₁₀O₆
  • C₅H₁₁O₆
  • C₆H₁₂O₆
  • S₆H₁₂O₆
0 Comments
Correct Answer: C. C₆H₁₂O₆

Explanation:

Glucose (C₆H₁₂O₆) is one of the most important carbohydrates in biology. It is ... Read More Details

7 Chemistry MCQs

What is the third most common gas found in the air we breathe?

  • Hydrogen
  • Neon
  • Carbon dioxide
  • Argon
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Correct Answer: D. Argon

Explanation:

The air around us is not a single substance but a mixture of ... Read More Details

8 Chemistry MCQs

What is the molecular formula of Ammonia?

  • NH
  • NH₂
  • NH₃
  • NH₄
0 Comments
Correct Answer: C. NH₃

Explanation:

Ammonia (NH₃) is a simple and important chemical compound composed of one nitrogen ... Read More Details

9 Chemistry MCQs

What is the molecular weight of Ammonia (NH₃)?

  • 17.031 g/mol
  • 18.031 g/mol
  • 19.031 g/mol
  • 27.033 g/mol
0 Comments
Correct Answer: A. 17.031 g/mol

Explanation:

Ammonia (NH₃) is a simple compound made of one nitrogen atom and three ... Read More Details

10 Physics MCQs

Who determined the absolute value of the charge on an electron?

  • J. J. Thomson
  • James Chadwick
  • Ernest Rutherford
  • Robert Millikan
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Correct Answer: D. Robert Millikan

Explanation:

The absolute value of the electron’s charge was first precisely measured by Robert ... Read More Details