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1 Organic Chemistry MCQs

Benzene mainly undergoes __________?

  • Addition reactions
  • Substitution reactions
  • Halogenation
  • None of the above
0 Comments
Correct Answer: B. Substitution reactions

Explanation:

Benzene (C₆H₆) is the simplest aromatic hydrocarbon and exhibits very unique chemical properties ... Read More Details

2 Inorganic Chemistry MCQs

The chemical formula of sand is ___________?

  • Si₂O₃
  • SiO₂
  • Al₂O₃
  • Sr₂O
0 Comments
Correct Answer: B. SiO₂

Explanation:

Sand is one of the most abundant natural materials found on Earth, primarily ... Read More Details

3 Physical Chemistry MCQs

Which of the following mixtures can be separated by the sublimation method?

  • Sand and Iron filings
  • Sand and Naphthalene
  • Both A & B
  • None of these
0 Comments
Correct Answer: B. Sand and Naphthalene

Explanation:

Sublimation is a separation technique based on the physical property of certain solids ... Read More Details

4 Physical Chemistry MCQs

Why do we determine the boiling point of a liquid?

  • To check its acidity and basicity
  • To check temperature
  • To check its purity and nature
  • None of these
0 Comments
Correct Answer: C. To check its purity and nature

Explanation:

Determining the boiling point of a liquid is one of the most fundamental ... Read More Details

5 Physical Chemistry MCQs

Why does ethyl alcohol (ethanol) have a higher boiling point than acetone?

  • Due to hydrogen bonding
  • Due to high molecular weight
  • Due to its acidic nature
  • Due to its low molecular weight
0 Comments
Correct Answer: A. Due to hydrogen bonding

Explanation:

The boiling point of a substance depends mainly on the strength of its ... Read More Details

6 Physical Chemistry MCQs

The boiling point of ethyl alcohol (ethanol) is ?

  • 78°C
  • 58°C
  • 73°C
  • 56°C
0 Comments
Correct Answer: A. 78°C

Explanation:

The boiling point of a substance is the temperature at which its vapor ... Read More Details

7 Physical Chemistry MCQs

The process in which a solid changes directly into vapors without passing through the liquid state is called _______?

  • Decantation
  • Sublimation
  • Evaporation
  • None of these
0 Comments
Correct Answer: B. Sublimation

Explanation:

Sublimation is a physical process in which a substance changes directly from the ... Read More Details

8 Analytical Chemistry MCQs

The pH of milk is approximately ?

  • 9
  • 6.5 – 7
  • 8
  • 12
0 Comments
Correct Answer: B. 6.5 – 7

Explanation:

Milk is a natural colloidal solution composed of water, proteins, lactose (milk sugar), ... Read More Details

9 Analytical Chemistry MCQs

Calculate the percentage of nitrogen (%N) in potassium nitrate (KNO₃):

  • 14.34%
  • 18.56%
  • 13.86%
  • None of these
0 Comments
Correct Answer: C. 13.86%

Explanation:

Potassium nitrate (KNO₃) is a common inorganic salt widely used in fertilizers, food ... Read More Details

10 Physical Chemistry MCQs

Elements that have the same number of neutrons are called ?

  • Isotopes
  • Isobars
  • Isotones
  • None of these
0 Comments
Correct Answer: C. Isotones

Explanation:

Atoms are characterized by three main numbers: the atomic number (Z), the mass ... Read More Details

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