Chapter 3: IGCSE O Level Chemistry Exam Tests
IGCSE O Level Chemistry MCQs - Chapter 3
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MCQ 31: The formula of Hydrogen Carbonate ion is
MCQ 32: In Na2CO3.10H2O, percentage of oxygen is
MCQ 33: The formula of aluminum sulfate indicates that for
MCQ 34: All of these ions have a valency of +2 except
MCQ 35: A water molecule will always contain
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