Question # 1

A close circuit is the.

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Complete path of electric current

Incomlete path of electric current

Broken path of electric current

None of the above

Thermal decompositionof calcium carbonate produces a gas.

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Oxygen

Carbon di oxide

Nitrogen

Carbon monoxide

Sodium hydroxide solution in water will

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Turn blue litmus red

Give pink colour with phenolpthalein

Give red colour with methyl orange.

Not affect the phenolphthalein indicator

A food chain starts from the..........

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Primary carnivores

Herbivores

Producers

Top carnivores

Unit of Pressure is

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Joule

Newton

Nm2

Nm-2

What happens when light hits a shiny or smooth surface.

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It is disappeared

It is refracted

It is absorbed

It is reflected

A relationship where two species live together closely is called

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Symbiosis

Predation

Competitor

None of these

The product fo the reaction between zinc and dilute sulphuric acid are.

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Zinc oxide and water

Zinc sulphide and water

Zinc sulphate and hydrogen

Zinc sulphide and hydrogen

Heating of solid potassium chlorate produces a gas.

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Chlorine

Carbon dioxide

Carbon mono oxide

Oxygen

In a convex mirror, focus is.

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Under the mirror

In front of the mirror

On the mirror

Behind the mirror

It takes about.......... minutes for light from the Sun to reach the Earth.

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6

7

8

9

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