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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 Physical Chemistry MCQs

What is the shape of the triiodide ion (I₃⁻)?

  • Trigonal bipyramidal
  • Linear
  • Square bipyramidal
  • Both A and C
0 Comments
Correct Answer: B. Linear

Explanation:

The triiodide ion (I₃⁻) is a polyatomic ion consisting of three iodine atoms. ... Read More Details

2 Physical Chemistry MCQs

The hybrid orbitals of BeCl₂ are of type __________?

  • sp²
  • sp³
  • sp
  • dsp²
0 Comments
Correct Answer: C. sp

Explanation:

Beryllium chloride (BeCl₂) is a linear molecule in which beryllium is bonded to ... Read More Details

3 Physical Chemistry MCQs

Molecular Orbital Theory is also called __________?

  • Bonding Theory
  • Band Theory
  • Antibonding Theory
  • π and σ Bonding Theory
0 Comments
Correct Answer: C. Antibonding Theory

Explanation:

The Molecular Orbital (MO) Theory explains how electrons are distributed in molecules. According ... Read More Details

4 Inorganic Chemistry MCQs

What is the chemical formula of Galena?

  • PbS
  • HgS
  • As₂S₃
  • FeS₂
0 Comments
Correct Answer: A. PbS

Explanation:

Galena is the natural mineral form of lead sulfide and is the most ... Read More Details

5 Inorganic Chemistry MCQs

Ethylenediamine (en) is a __________ ligand.

  • Monodentate
  • Bidentate
  • Tridentate
  • Polydentate
0 Comments
Correct Answer: B. Bidentate

Explanation:

In coordination chemistry, a ligand is an ion or molecule that binds to ... Read More Details

6 Analytical Chemistry MCQs

In volumetric analysis, the methyl orange indicator is used when __________?

  • Acid is strong
  • Acid is weak
  • Base is strong
  • Acid is strong and base is weak
0 Comments
Correct Answer: A. Acid is strong

Explanation:

In volumetric analysis, indicators are substances that change color at or near the ... Read More Details

7 Physical Chemistry MCQs

For the reaction 2HI → H₂ + I₂, how do the equilibrium constants Kp and Kc compare?

  • Kp > Kc
  • Kc > Kp
  • Kp = Kc
  • Kp ≤ Kc
0 Comments
Correct Answer: C. Kp = Kc

Explanation:

Equilibrium constants describe the ratio of products to reactants at equilibrium. Kc is ... Read More Details

8 Organic Chemistry MCQs

The reaction with Lucas reagent is fastest with which alcohol?

  • (CH₃)₂CHOH (Secondary alcohol)
  • CH₃(CH₂)OH (Long-chain primary alcohol)
  • CH₃CH₂OH (Primary alcohol)
  • (CH₃)₃COH (Tertiary alcohol)
0 Comments
Correct Answer: D. (CH₃)₃COH (Tertiary alcohol)

Explanation:

The Lucas test is a classical method in organic chemistry for distinguishing between ... Read More Details

9 Analytical Chemistry MCQs

If a compound contains 24 g of carbon, 2 g of hydrogen, and 64 g of oxygen, what will be its empirical formula?

  • C₂H₂O₄
  • CH₂
  • CH₂O
  • CHO₂
0 Comments
Correct Answer: D. CHO₂

Explanation:

The empirical formula of a compound represents the simplest whole-number ratio of atoms ... Read More Details

10 Inorganic Chemistry MCQs

Why are noble gases called the zero group elements?

  • Zero valency
  • Zero electronegativity
  • Zero electron affinity
  • Both A and B
0 Comments
Correct Answer: D. Both A and B

Explanation:

Noble gases, also known as Group 18 elements in the modern periodic table, ... Read More Details

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