IGCSE O Level Chemistry MCQs – Mock Test 17

Chemical Symbols Quiz with Answers PDF Download – Test 17

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Chemical Symbols Quiz – Mock Test 17 PDF Download

MCQ 81: Variable valencies are used to indicate ions:

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

MCQ 82: In CuO (Copper Oxide), the valency of Copper is:

+1
+2
−1
−2

MCQ 83: In order to get Sodium Sulfite (Na₂SO₃) as product, the reactants shall be Sulfur Dioxide (SO₂) and:

Na₂CO₃
NaOH
NaCl
Na₂CO₃ and NaOH

MCQ 84: Old paintings became decolorized due to:

Lead Sulphide PbS
Lead Sulphate PbSO₄
Lead Chloride PbCl₂
Lead Oxide PbO

MCQ 85: Relative molecular mass of Na₂CO₃ is:

IGCSE O Level Chemistry Quiz App & eBook – Chemical Symbols Admission Tests

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