IGCSE O Level Chemistry MCQs - Chapter 3

Chemical Formulae and Equations Multiple Choice Questions (MCQ) PDF - 2

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Chemical Formulae & Equations Questions & Answers PDF Download: MCQ 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

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