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Chemistry MCQs

Prepare for competitive exams with our topic-wise Chemistry MCQs covering fundamental and advanced concepts. These multiple-choice questions include atomic structure, chemical bonding, periodic table, acids & bases, organic chemistry, thermodynamics, chemical equations, mole concept, electrochemistry, and biochemistry. Ideal for science students and job aspirants appearing in PPSC, FPSC, CSS, NTS, SPSC, BPSC, KPSC, ETEA, AJKPSC, and other testing services. A valuable resource for teachers, educators, and candidates targeting science educator posts, laboratory roles, and general science sections in public sector exams.

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1 Organic Chemistry MCQs

The preparation of benzene from acetylene (C₂H₂) can also be described as ?

  • Oxidation
  • Polymerization
  • Dehydration
  • Condensation
0 Comments
Correct Answer: B. Polymerization

Explanation:

The preparation of benzene from acetylene (C₂H₂) is an important reaction in organic ... Read More Details

2 Organic Chemistry MCQs

What is produced when benzene undergoes ozonolysis?

  • Glycol
  • Glyoxal
  • Vicinal diol
  • Both B and C
0 Comments
Correct Answer: B. Glyoxal

Explanation:

Ozonolysis is an oxidation reaction in which an organic compound containing double or ... Read More Details

3 Inorganic Chemistry MCQs

Boron is a non-metal, whereas aluminium (Al) is a metal. This is because of ?

  • Its small atomic size
  • Its high nuclear charge
  • Both A and B
  • No valid explanation yet
0 Comments
Correct Answer: C. Both A and B

Explanation:

Boron and aluminium both belong to Group 13 of the periodic table, yet ... Read More Details

4 Inorganic Chemistry MCQs

One of the outstanding features of boron is its ability to form ?

  • Molecular addition compounds
  • Molecular crystals
  • Semiconductors
  • Ionic compounds
0 Comments
Correct Answer: A. Molecular addition compounds

Explanation:

Boron, the first element of group 13 in the periodic table, is a ... Read More Details

5 Inorganic Chemistry MCQs

Borax is a white crystalline solid. It is ?

  • More soluble in cold water
  • More soluble in hot water
  • Insoluble in water
  • Soluble only in organic solvents
0 Comments
Correct Answer: B. More soluble in hot water

Explanation:

Borax, also known as sodium tetraborate decahydrate (Na₂B₄O₇·10H₂O), is a white crystalline solid ... Read More Details

6 Inorganic Chemistry MCQs

What is the special feature of borate glass?

  • Heat resistant
  • Low melting
  • Used to prepare chemical garden
  • Green in colour
0 Comments
Correct Answer: A. Heat resistant

Explanation:

Borate glass is a type of glass in which boron trioxide (B₂O₃) is ... Read More Details

7 Inorganic Chemistry MCQs

What type of oxide is aluminium oxide (Al₂O₃)?

  • Acidic oxide
  • Basic oxide
  • Amphoteric oxide
  • It does not exist
0 Comments
Correct Answer: C. Amphoteric oxide

Explanation:

Aluminium oxide (Al₂O₃) is an example of an amphoteric oxide, which means it ... Read More Details

8 Inorganic Chemistry MCQs

Which electronic configuration corresponds to an element of Group IIIA?

  • 1s² 2s² 2p³
  • 1s² 2s² 2p⁶ 3s² 3p¹
  • 1s² 2s² 2p⁴
  • 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
0 Comments
Correct Answer: B. 1s² 2s² 2p⁶ 3s² 3p¹

Explanation:

Elements of Group IIIA (Group 13) in the periodic table include boron (B), ... Read More Details

9 Inorganic Chemistry MCQs

In the network of silica (SiO₂), each silicon atom is surrounded by __________ oxygen atoms.

  • 4
  • 2
  • 1
  • 6
0 Comments
Correct Answer: A. 4

Explanation:

Silica (SiO₂), also called silicon dioxide, is a major constituent of the Earth’s ... Read More Details

10 Inorganic Chemistry MCQs

Orthoboric acid is 2.6% soluble in water at 40°C and __________ at 107°C.

  • 26%
  • 27%
  • 37%
  • Less than 2.6%
0 Comments
Correct Answer: C. 37%

Explanation:

Orthoboric acid (H₃BO₃), commonly known as boric acid, is a weak, crystalline compound ... Read More Details

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