Question # 1

On heating sugar changes into

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Carbon

Water

Both carbon and water

Heat

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

Compustion is a.

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Physical Change

Chemical change

Thermal change

None of these

Freezing of a liquid is a

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Chemical change

Chemicla property

Physical change

None of these

Sajeet the one that is different from the otehrs.

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Solubility

Conductance

Oxidation

Coiling of a substance

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

Rusting of iron takes place in the presence of.

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Moisture

O2

Both moisture and O2

Dry air

Product fo combustion is.

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C

O2

CO2

All of these

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