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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 Inorganic Chemistry MCQs

What is the chemical symbol of Tungsten?

  • Z
  • T
  • Tn
  • W
0 Comments
Correct Answer: D. W

Explanation:

Tungsten is a transition metal in the periodic table, with atomic number 74. ... Read More Details

2 Inorganic Chemistry MCQs

The composition of “Golden Spangles” is:

  • Lead(II) chromate (PbCrO₄)
  • Lead(II) iodide (PbI₂)
  • Arsenic dichromate (As₂Cr₂O₇)
  • Barium chromate (BaCrO₄)
0 Comments
Correct Answer: A. Lead(II) chromate (PbCrO₄)

Explanation:

Golden Spangles is the common name given to Lead(II) chromate (PbCrO₄), an inorganic ... Read More Details

3 Inorganic Chemistry MCQs

When SO₂ solution is passed over which of the following substances does it turn green?

  • Potassium dichromate (K₂Cr₂O₇)
  • Sulfuric acid (H₂SO₄)
  • Sulfur trioxide (SO₃)
  • Phosphorus pentoxide (P₂O₅)
0 Comments
Correct Answer: A. Potassium dichromate (K₂Cr₂O₇)

Explanation:

This reaction is an important example of redox chemistry in inorganic chemistry. Sulfur ... Read More Details

4 Analytical Chemistry MCQs

A bivalent metal has an equivalent weight of 12. The molecular weight of its oxide will be:

  • 24
  • 32
  • 36
  • 40
0 Comments
Correct Answer: D. 40

Explanation:

This question is a classical application of the concept of equivalent weight and ... Read More Details

5 Analytical Chemistry MCQs

The weight of a metal with an equivalent weight of 12 that will give 0.475 g of its chloride is:

  • 0.12 g
  • 0.16 g
  • 0.18 g
  • 0.24 g
0 Comments
Correct Answer: C. 0.18 g

Explanation:

This problem is based on the law of chemical equivalence, which is widely ... Read More Details

6 Physical Chemistry MCQs

The amount of Zinc (at. wt = 65) necessary to produce 224 mL of H₂ gas by reaction with an acid is?

  • 0.065 g
  • 0.65 g
  • 6.5 g
  • 7.5 g
0 Comments
Correct Answer: D. 7.5 g

Explanation:

Zinc reacts with acids such as hydrochloric acid or sulfuric acid to liberate ... Read More Details

7 Inorganic Chemistry MCQs

Which of the following compounds is not soluble in nitric acid (HNO₃)?

  • Copper(II) sulfide (CuS)
  • Cadmium sulfide (CdS)
  • Lead(II) sulfide (PbS)
  • Silver chloride (AgCl)
0 Comments
Correct Answer: D. Silver chloride (AgCl)

Explanation:

The solubility of a compound in nitric acid depends on its chemical nature ... Read More Details

8 Environmental Chemistry MCQs

Which anions of soap react with Ca²⁺ and Mg²⁺ ions in hard water to form curd (scum)?

  • Sodium hexadecanoate
  • Sodium octadecanoate
  • Sodium pentadecanoate
  • Both A & B
0 Comments
Correct Answer: D. Both A & B

Explanation:

Soaps are sodium or potassium salts of long-chain fatty acids. When soap is ... Read More Details

9 Organic Chemistry MCQs

What is the hybridization of the nitrogen atom in pyridine?

  • sp
  • sp²
  • sp³
  • It is not hybridized
0 Comments
Correct Answer: B. sp²

Explanation:

Pyridine is a six-membered aromatic heterocyclic compound with one nitrogen atom in the ... Read More Details

10 Organic Chemistry MCQs

What is the IUPAC name of pyridine?

  • Azolo
  • Azine
  • Azolidins
  • Diazine
0 Comments
Correct Answer: B. Azine

Explanation:

Pyridine is a basic nitrogen-containing heterocyclic compound. Its structure consists of a six-membered ... Read More Details

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