IGCSE O Level Chemistry Study Material: Practice Test 7 (Chapter 3)

Chemical Formulae and Equations Quiz Questions & Answers PDF Download - 7

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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 Study Material: IGCSE O Level Chemistry App & eBook Quizzes

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