IGCSE O Level Chemistry Entrance Tests: Practice Test 2 (Chapter 3)

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

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Chemical Formulae & Equations Test Questions and Answers PDF Download: MCQ 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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