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Online Tests
Science 7th Class English Medium Chapter 5 Online Test MCQs With Answers
Question # 1
Chemical reaction of oxygen with other substances is called.
Choose an answer
Oxidation
Reduction
Rusting
None of these
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Question # 2
A piece of iron is kept in open air for 5 days. A film of corrosion formed over it is.
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Iron oxide
Iron sulphide
Iron Chloride
Iron Hydride
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Question # 3
Compustion is a.
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Physical Change
Chemical change
Thermal change
None of these
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Question # 4
What happens to water on heating.
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Evaporates
Condense
Freez
None of these
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Question # 5
The temperature at which a liquid's vapour pressure is equal to the external pressure surrounding the liquid is.
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Melting point
Boiling point
Freezing point
Highest temperature.
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Question # 6
What are teh products when electric current is passed through water.
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Only steam
Hydrogen and steam
Hydrogen and oxygen
Oxygen and steam
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Question # 7
Formation of steam from water is example of.
Choose an answer
Chemical change
Physical Change
Both of these
None of these
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Question # 8
Sajeet the one that is different from the otehrs.
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Solubility
Conductance
Oxidation
Coiling of a substance
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Question # 9
Freezing of a liquid is a
Choose an answer
Chemical change
Chemicla property
Physical change
None of these
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Question # 10
A physical change occurs when.
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Iron rusts
Solution of common salt is heated
A piece of wood burns
Sygar us geated strongly
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