IGCSE O Level Chemistry Cerification Guide: Practice Test 19 (Chapter 3)

Chemical Formulae and Equations Quiz Questions & Answers PDF Download - 19

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Chemical Formulae & Equations Exam Questions and Answers PDF Download: Test 19

MCQ: 91

Law of conservation of mass ensures that the number of atoms of elements before and after the reaction is

same
different
varies
none of above

MCQ: 92

If an acid reacts with an oxide, the product will include H₂O and

a salt(s)
an acid (l)
a base
a gas

MCQ: 93

While writing ionic equations,

ions actively involved in chemical change are written down only
spectator ions may be omitted only
only spectator ions are written down
ions actively involved in chemical change are written down and spectator ions may be omitted

MCQ: 94

In KHCO₃, the highest percentage composition is of

Oxygen
Potassium
Carbon
Hydrogen

MCQ: 95

Valency of all of these ions is +1, except

Ag
Cu
NH₄
Fe

Chemical Formulae & Equations Cerification Guide: IGCSE O Level Chemistry App & eBook Quizzes

Acids and Bases MCQs

Structure of Atom MCQs

Salts and Identification of Ions and Gases MCQs

Elements, Compounds and Mixtures MCQs

Energy from Chemicals MCQs

Particles of Matter MCQs

Chemical Bonding and Structure MCQs

Methods of purification MCQs

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