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Study Simple chemical reactions Notes Questions and Answers PDF for science virtual learning success. Download the Simple Chemical Reactions Quiz Answers PDF e-Book, Ch. 20-4 to study Class 7 Science Course. Practice Physical and Chemical Change MCQ PDF, Simple Chemical Reactions Quiz Questions and Answers for science virtual learning success. Free Simple Chemical Reactions Learning App: Download Class 7 Science Notes App to physical and chemical change test prep for science group learning platforms.

Download Simple Chemical Reactions Learning App with MCQ: "Process of breaking down of any substance into smaller substances by heating, is called"; with answers: evaporation, decomposition, thermal decomposition, and melting. Practice Physical and Chemical Change MCQ Questions, download Kobo e-Book (Free Chapter) to improve test preparation.

Simple Chemical Reactions MCQs – Practice Test 4 PDF Download

MCQ 16: The process of breaking down of any substance into smaller substances by heating, is called:

  1. decomposition
  2. evaporation
  3. thermal decomposition
  4. melting

MCQ 17: Zinc salt reacts with dilute shulphuric acid to form zinc salt and:

  1. hydrogen
  2. oxygen
  3. carbon dioxide
  4. carbon monoxide

MCQ 18: Natural gas is made up of compound:

  1. carbon
  2. methane
  3. ethene
  4. ethane

MCQ 19: Power machines in factories and vehicles are examples of:

  1. combustion
  2. thermal decomposition
  3. evaporation
  4. combination

MCQ 20: Natural gas is more efficient and produces less:

  1. pollution
  2. heat
  3. reaction
  4. less evaporation

Simple Chemical Reactions Exam Prep – Class 7 Science Notes App & e-Book

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