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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

Nitrates of which pair of elements give different products on thermal decomposition?

  • Na and K
  • Mg and Ca
  • Li and Na
  • Li and Ca
0 Comments
Correct Answer: C. Li and Na

Explanation:

The thermal decomposition of nitrates depends on the metal cation in the compound. ... Read More Details

2 Inorganic Chemistry MCQs

Which of the following sulphates is not soluble in water?

  • Sodium sulphate (Na₂SO₄)
  • Potassium sulphate (K₂SO₄)
  • Zinc sulphate (ZnSO₄)
  • Barium sulphate (BaSO₄)
0 Comments
Correct Answer: D. Barium sulphate (BaSO₄)

Explanation:

The solubility of sulphates in water varies depending on the metal cation present. ... Read More Details

3 Inorganic Chemistry MCQs

The ore CaSO₄·H₂O has the general name ?

  • Gypsum
  • Dolomite
  • Calcite
  • Plaster of Paris
0 Comments
Correct Answer: A. Gypsum

Explanation:

Gypsum is a naturally occurring mineral composed of calcium sulfate dihydrate (CaSO₄·2H₂O). The ... Read More Details

4 Inorganic Chemistry MCQs

Which one of the following substances conducts electricity by the movement of ions?

  • Graphite
  • Copper
  • Molten sodium chloride (NaCl)
  • Mercury
1 Comments
Correct Answer: C. Molten sodium chloride (NaCl)

Explanation:

Electricity conduction depends on the presence of mobile charge carriers. In substances like ... Read More Details

5 Inorganic Chemistry MCQs

Which one of the following carbonates is water insoluble?

  • Na₂CO₃
  • K₂CO₃
  • (NH₄)₂CO₃
  • CaCO₃
0 Comments
Correct Answer: D. CaCO₃

Explanation:

Calcium carbonate (CaCO₃) is a sparingly soluble or practically insoluble carbonate in water, ... Read More Details

6 Inorganic Chemistry MCQs

In a diaphragm cell, hydrogen is discharged by the reduction of ?

  • Water
  • Hydrochloric acid (HCl)
  • Sodium ion (Na⁺)
  • Sodium chloride (NaCl)
0 Comments
Correct Answer: A. Water

Explanation:

The diaphragm cell is an electrolytic cell used mainly for the electrolysis of ... Read More Details

7 Inorganic Chemistry MCQs

Gypsum is applied to the soil as a source of ?

  • Calcium (Ca) and Phosphorus (P)
  • Sulphur (S) and Phosphorus (P)
  • Calcium (Ca) and Sulphur (S)
  • We could not apply
0 Comments
Correct Answer: C. Calcium (Ca) and Sulphur (S)

Explanation:

Gypsum, chemically known as calcium sulphate dihydrate (CaSO₄·2H₂O), is an important mineral used ... Read More Details

8 Inorganic Chemistry MCQs

Which one of the following alkali metals forms only a normal oxide when it reacts with oxygen (O₂)?

  • Lithium
  • Sodium
  • Potassium
  • Rubidium
0 Comments
Correct Answer: A. Lithium

Explanation:

Among the alkali metals, the type of oxide formed when reacting with oxygen ... Read More Details

9 Inorganic Chemistry MCQs

Which one of the following pairs shows a diagonal relationship in the periodic table?

  • Sodium and Lithium
  • Lithium and Magnesium
  • Lithium and Beryllium
  • Boron and Beryllium
0 Comments
Correct Answer: B. Lithium and Magnesium

Explanation:

In the periodic table, a diagonal relationship refers to the similarity in chemical ... Read More Details

10 Inorganic Chemistry MCQs

Sodium is not found in the +2 oxidation state because of its ?

  • High first ionization potential
  • High second ionization potential
  • High ionic radius
  • High electronegativity
0 Comments
Correct Answer: B. High second ionization potential

Explanation:

Sodium (Na) belongs to Group 1 (alkali metals) of the periodic table and ... Read More Details

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