Question # 1

Sajeet the one that is different from the otehrs.

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Solubility

Conductance

Oxidation

Coiling of a substance

A gas produced on heating solid potassium chlorate is.

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Hydrogen

Carbon dioxide

Oxygen

Methane

Chemical reaction of oxygen with other substances is called.

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Oxidation

Reduction

Rusting

None of these

During combustion, a substance reacts with

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Hydrogen

Water

Oxygen

Carbon di oxide

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.

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

What happens to water on heating.

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Evaporates

Condense

Freez

None of these

On heating sugar changes into

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Carbon

Water

Both carbon and water

Heat

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

Original colur or Nichrome wire is.

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Silver grey

Red hot

White hot

None of these

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