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

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Chemical Formulae & Equations Quiz PDF Download – Practice Test 3

MCQ 11: Variable valencies are used to indicate ions:

greater than +1
greater than −1
with more than one valency
none of above

MCQ 12: In CuO (Copper Oxide), the valency of Copper is:

+1
+2
−1
−2

MCQ 13: In order to get Sodium Sulfite (Na₂SO₃) as product, the reactants shall be Sulfur Dioxide (SO₂) and:

Na₂CO₃
NaOH
NaCl
Na₂CO₃ and NaOH

MCQ 14: Relative molecular mass of Na₂CO₃ is:

MCQ 15: Formula of Ammonium Sulfate ((NH₄)₂SO₄) is:

NH₄(SO₄)₂
NH₄(HSO₄)₂
(NH₄)₂SO₄
(NH₃)₂SO₃

IGCSE O Level Chemistry Quiz App & e-Book – Chemical Formulae & Equations Certification Guide

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