IGCSE O Level Chemistry Practice Test 17
Chemical Symbols Quiz Questions and Answers PDF Download - 17
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Chemical Symbols Questions and Answers PDF Download: MCQ 17
Variable valencies are used to indicate ions
- greater than +1
- greater than −1
- with more than one valency
- none of above
In CuO (Copper Oxide), the valency of Copper is
- +1
- +2
- −1
- −2
In order to get Sodium Sulfite (Na2SO3) as product, the reactants shall be Sulfur Dioxide (SO2) and
- Na2CO3
- NaOH
- NaCl
- Na2CO3 and NaOH
Old paintings became decolorized due to
- Lead Sulphide PbS
- Lead Sulphate PbSO4
- Lead Chloride PbCl2
- Lead Oxide PbO
Relative molecular mass of Na2CO3 is
- 98
- 128
- 286
- 198
IGCSE O Level Chemistry Exam Prep Tests
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