IGCSE O Level Chemistry Competitive Exam MCQs – Practice Test 21 (Chapter 3)

Chemical Formulae and Equations MCQs with Answers PDF Download – Test 21

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Learn Chemical Formulae and Equations Multiple Choice Questions (MCQs) with Answers PDF (Chemical Formulae and Equations MCQs PDF e-Book) download Ch. 3-21 to study IGCSE O Level Chemistry Course. Practice Molar Mass MCQs, Chemical Formulae and Equations quiz questions and answers PDF for chemistry digital academic support. Download the IGCSE O Level Chemistry Study App: Free Chemical Formulae and Equations MCQs App to study reactants, percent composition of elements, chemical symbols career test for chemistry study success.

Free "IGCSE O Level Chemistry" App Download with MCQ: Molar mass of Copper Oxide (Cu₂O) is; with answers: 139.33 g/mol, 113.14 g/mol, 173.298 g/mol, and 143.09 g/mol for chemistry study success. Solve Collection of Gases Quiz Questions, download Google e-Book (Free Chapter) to enhance chemistry remote accessibility.

Chemical Formulae & Equations MCQs with Answers PDF Download: MCQ Quiz 21

MCQ 101: Molar mass of Copper Oxide (Cu₂O) is:

113.14 g/mol
139.33 g/mol
173.298 g/mol
143.09 g/mol

MCQ 102: Consider the reactants: HNO₃ and BaSO₃:

reaction takes place in aquatic state
the reaction results in Barium nitrate
reaction results in barium nitrite
the reaction may not occur at all

MCQ 103: In Na₂CO₃.10H₂O, after water, the highest percentage composition is of:

sodium
oxygen
carbon
hydrogen

MCQ 104: Copper can have a charge of:

2 or 4
4 or 6
3 or 5
2 or 1

MCQ 105: The formula of Calcium Hydrogen Carbonate indicates that the:

charge on Ca is +2
charge on HCO₃ is −1
for each molecule of calcium hydrogen carbonate, one ion of Ca and two ions of hydrogen carbonate ar
all of above

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