IGCSE O Level Chemistry MCQs – Practice Test 30 (Chapter 3)

Chemical Formulae and Equations MCQ with Answers PDF Download – Test 30

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Download "Chemical Formulae and Equations Learning" App (Android & iOS): Combining Copper(II) (Cu⁺²) with Oxygen (O₂) results in; MCQ with answers: cu₂o, cuo, cuo₂, and cu(oh)₂. Practice Chemical & Ionic Equations Quiz Questions, download Apple Book (Free Chapter) to maximize chemistry digital pathways.

Chemical Formulae & Equations MCQ with Answers PDF Download: Quiz 30

MCQ 146: Combining Copper(II) (Cu⁺²) with Oxygen (O₂) results in:

CuO
Cu₂O
CuO₂
Cu(OH)₂

MCQ 147: Molar mass of (NH₄)₂SO₄ is:

113.19 g/mol
124.21 g/mol
141.39 g/mol
132.139 g/mol

MCQ 148: The chemical formula of rouge pigment is:

Fe₂O₃
Fe₃O₄
FeSO₄
FeNO₃

MCQ 149: To form Copper(II) Hydroxide, number of Hydroxyl ions to gain stability with one Copper ion will be:

MCQ 150: When Carbon ions (C^±4) react with Carbon Dioxide gas (CO₂), the product will be:

methane
ethane
propane
carbon monoxide

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