IGCSE O Level Chemistry MCQs – Practice Test 2 (Chapter 3)

Chemical Formulae and Equations MCQ with Answers PDF Download – Test 2

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Chemical Formulae & Equations MCQ with Answers PDF Download: Quiz 2

MCQ 6: Valency of carbonate ion CO₃⁻ is:

-1
-2
-3
-4

MCQ 7: All are covalent compounds except:

NO₂
SO₃
SO₂
HNO₃

MCQ 8: The empirical formula is the:

simplest formula
molecular formula
chemical formula
ionic exponential formula

MCQ 9: All of these radicals have a Valency of 2, except:

SO₄
CO₃
NH₄
MgCO₃

MCQ 10: The formula of hydrated Sodium Carbonate is:

Na(HCO₃)₂
Na₂CO₃.(H₂O)₅
Na₂CO₃.10H₂O
Na₃CO₄.10H₂O

IGCSE O Level Chemistry Notes App & e-Book – Chemical Formulae & Equations Exam Prep

Redox Reactions MCQs

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Particles of Matter MCQs

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Chemical Bonding and Structure MCQs

Methods of purification MCQs

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