Class 7 Science MCQs - Chapter 20
Simple Chemical Reactions Trivia Questions & Answers PDF Download - 4
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The Quiz: The process of breaking down of any substance into smaller substances by heating, is called; "Simple Chemical Reactions" App APK Download with answers: evaporation, decomposition, thermal decomposition, and melting to study online courses. Practice Physical and Chemical Change MCQ Questions, download Kindle eBook (Free Sample) for online elementary school classes.
Simple Chemical Reactions Test Questions and Answers PDF Download: MCQ 4
The process of breaking down of any substance into smaller substances by heating, is called
- decomposition
- evaporation
- thermal decomposition
- melting
Zinc salt reacts with dilute shulphuric acid to form zinc salt and
- hydrogen
- oxygen
- carbon dioxide
- carbon monoxide
Natural gas is made up of compound
- carbon
- methane
- ethene
- ethane
Power machines in factories and vehicles are examples of
- combustion
- thermal decomposition
- evaporation
- combination
Natural gas is more efficient and produces less
- pollution
- heat
- reaction
- less evaporation
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