IGCSE O Level Chemistry MCQs – Mock Test 17

Chemical Symbols Quiz with Answers PDF Download – Test 17

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The MCQ: Variable valencies are used to indicate ions; "Chemical Symbols" App Download [Free] with answers: greater than −1, greater than +1, and with more than one valency for online colleges for science. Learn Chemical Formulae and Equations Questions and Answers, Apple iBook to download free chapter to learn online IGCSE GCSE courses.

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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Redox Reactions MCQs

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Conductors and Non Conductors MCQs

Electrolyte and Non Electrolyte MCQs

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Chemical Reactions MCQs

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