Question # 1

Sajeet the one that is different from the otehrs.

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Solubility

Conductance

Oxidation

Coiling of a substance

Product fo combustion is.

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C

O2

CO2

All of these

Freezing of a liquid is a

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Chemical change

Chemicla property

Physical change

None of these

Zince oxide is ............... solid substances.

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Red

White

Yellow

Blue

Rusting of iron takes place in the presence of.

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Moisture

O2

Both moisture and O2

Dry air

Formation of steam from water is example of.

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Chemical change

Physical Change

Both of these

None of these

Original colur or Nichrome wire is.

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Silver grey

Red hot

White hot

None of these

Chemical reaction of oxygen with other substances is called.

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Oxidation

Reduction

Rusting

None of these

Select all that happen during a chemicla change.

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A temporary chagne occurs.

Composition of the substanes is changed.

Propertis of the sbstances are changed.

New substances with different properties are formed.

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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Science 7th Class English Medium Chapter 5 Online Test MCQs With Answers

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