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IGCSE O Level Chemistry Exam MCQs – Practice Test 20 (Chapter 3)

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Learn Chemical Formulae and Equations Notes Questios and Answers PDF for chemistry classroom learning. Download the Chemical Formulae and Equations Quiz Answers PDF e-Book, Ch. 3-20 to study IGCSE O Level Chemistry Course. Solve Chemical Symbols MCQs, Chemical Formulae and Equations quiz answers PDF for chemistry classroom learning. Free Chemical Formulae and Equations Notes App: Download the IGCSE O Level Chemistry Learning App to learn valency and chemical formula, gce o level chemistry career test to improve chemistry online effectiveness.

Download the Chemical Formulae and Equations Learning App: In Calcium Hydroxide (Ca(OH)2), valency of Ca is; MCQ with answers: −2, −1, +1, and ư. Practice Isotopes: Number of Neutrons Quiz Questions, download Kobo e-Book (Free Chapter) for chemistry classroom learning.

Chemical Formulae & Equations Test Questions and Answers PDF Download: MCQ 20

MCQ 96: Ca(OH)2 indicates that the molecule is formed through:

  1. two Ca ions and one OH ion
  2. One Ca ion and two OH ions
  3. three Ca ion and two OH ions
  4. four Ca ion and two OH ions

MCQ 97: In Calcium Hydroxide (Ca(OH)2), valency of Ca is:

  1. −1
  2. −2
  3. +1
  4. +2

MCQ 98: The chemical formula of Sodium Sulfite is:

  1. Na2SO3
  2. Na(SO4)2
  3. Na2CO3.10H2O
  4. NaH2PO4.H2O

MCQ 99: Ions remaining unchanged in both reactants and products are called as:

  1. residual ions
  2. sublimates
  3. spectator ions
  4. radical ions

MCQ 100: The chemical formula of Potassium Hydrogen Carbonate:

  1. KHCO3
  2. K2CO3.H2O
  3. KCO3
  4. K2CO4.H2O

Chemical Formulae & Equations Exam Prep – IGCSE O Level Chemistry Notes App & e-Book

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