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1 Organic Chemistry MCQs

When sulphuric acid (H₂SO₄) is treated with ethanol (C₂H₅OH), sulphuric acid acts as:

  • An acid
  • A dehydrating agent
  • An oxidizing agent
  • A sulphonating agent
0 Comments
Correct Answer: B. A dehydrating agent

Explanation:

When ethanol (C₂H₅OH) is treated with concentrated sulphuric acid (H₂SO₄), the acid does ... Read More Details

2 Inorganic Chemistry MCQs

Which one of the following elements has a melting point below 0°C?

  • Nitrogen (N)
  • Phosphorus (P)
  • Carbon (C)
  • Bismuth (Bi)
0 Comments
Correct Answer: A. Nitrogen (N)

Explanation:

The melting point of an element is the temperature at which it changes ... Read More Details

3 Inorganic Chemistry MCQs

The most electronegative element among the following is:

  • Antimony (Sb)
  • Nitrogen (N)
  • Arsenic (As)
  • Phosphorus (P)
0 Comments
Correct Answer: B. Nitrogen (N)

Explanation:

Electronegativity is a measure of the tendency of an atom to attract a ... Read More Details

4 Inorganic Chemistry MCQs

Phosphine gas will be produced if phosphorous acid (H₃PO₃) is subjected to:

  • Oxidation
  • Reduction
  • Decomposition
  • Both B & C
0 Comments
Correct Answer: C. Decomposition

Explanation:

Phosphorous acid (H₃PO₃) is a diprotic acid and an important compound of phosphorus ... Read More Details

5 Inorganic Chemistry MCQs

Which one of the following is not a property of pure quartz?

  • Coloured solid
  • Brittle
  • Hard
  • All of the above
0 Comments
Correct Answer: A. Coloured solid

Explanation:

Quartz is one of the most abundant and well-known minerals on Earth, composed ... Read More Details

6 Inorganic Chemistry MCQs

Which of the following does not contain phosphorus?

  • Yolk of egg
  • Bone
  • Nerves
  • Steel
0 Comments
Correct Answer: D. Steel

Explanation:

Phosphorus is a vital non-metallic element found in many organic and inorganic compounds. ... Read More Details

7 Inorganic Chemistry MCQs

Which one of the following is not a use of graphite?

  • Lead pencils
  • Abrasive
  • Lubricant
  • Electrode in an electrolytic cell
0 Comments
Correct Answer: B. Abrasive

Explanation:

Graphite is a soft, black, crystalline form of carbon known for its unique ... Read More Details

8 Inorganic Chemistry MCQs

What is the composition of the brown ring formed in the nitrate test?

  • FeSO₄·NO
  • FeSO₄·NO₂
  • FeSO₄·NO₃
  • FeSO₄·N₂O
0 Comments
Correct Answer: A. FeSO₄·NO

Explanation:

The brown ring test is a classical method used to detect the presence ... Read More Details

9 Inorganic Chemistry MCQs

Which one of the following compounds has a garlic-like smell?

  • Phosphorus trioxide (P₂O₃)
  • Phosphorus pentoxide (P₂O₅)
  • Phosphorous acid (H₃PO₃)
  • All have the same smell
0 Comments
Correct Answer: A. Phosphorus trioxide (P₂O₃)

Explanation:

Among phosphorus compounds, phosphorus trioxide (P₂O₃) is known for its distinct garlic-like smell. ... Read More Details

10 Inorganic Chemistry MCQs

Which element in Group VIA (Group 16) of the Periodic Table is a non-metal?

  • Sulfur (S)
  • Selenium (Se)
  • Tellurium (Te)
  • Polonium (Po)
0 Comments
Correct Answer: A. Sulfur (S)

Explanation:

Group VIA, now referred to as Group 16 in the modern periodic table, ... Read More Details

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