IGCSE O Level Chemistry MCQs – Practice Test 7 (Chapter 3)

Chemical Formulae and Equations Quiz with Answers PDF Download – Test 7

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Download the "Chemical Formulae and Equations Quiz" App (Android & iOS): In Na₂CO₃.10H₂O, percentage of oxygen is; MCQ with answers: 0.1608, 0.1678, 0.1659, and 0.1684. Study Ionic Compounds: Crystal Lattices Quiz Questions, download Google Book (Free Chapter) for chemistry online learning convenience.

Chemical Formulae & Equations Exam Questions and Answers PDF Download: Test 7

MCQ 31: The formula of Hydrogen Carbonate ion is:

HCO₂
HCO₃
HCO₄
H₂CO₃

MCQ 32: In Na₂CO₃.10H₂O, percentage of oxygen is:

0.1678
0.1608
0.1659
0.1684

MCQ 33: The formula of aluminum sulfate indicates that for:

each ion of Al, two ions of sulphate are required
each ion of Al, three ions of sulphate are required
two ions of Al, 3 ions of sulphate are required
two ions of Al, three ions of sulphate are required

MCQ 34: All of these ions have a valency of +2 except:

Pb
Ca
Zn
NH₄

MCQ 35: A water molecule will always contain:

11% of oxygen and 89% of hydrogen
18% of oxygen and 88% of hydrogen
11.11% of oxygen and 88.89% of hydrogen
15% of oxygen

Chemical Formulae & Equations Quiz App & e-Book – IGCSE O Level Chemistry Study Material

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