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Science 8th Class Urdu Medium Online Test MCQs With Answers

Question # 1

--------------- is used is solar cooker.

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Convex mirror

Concave mirror

Convex lens

Concave lens

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Question # 2

A .......... force actingon a stationary object could make the object start moving.

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Balanced

Inclined

Unbalanced

Perpedicular

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Question # 3

Cleaning of ...... by artificial method is called dialysis.

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Water

Urine

Acid

Blood

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Question # 4

Heating of solid potassium chlorate produces a gas.

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Chlorine

Carbon dioxide

Carbon mono oxide

Oxygen

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Question # 5

Acid used as a dehydrating agent.

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Nitric Acid

Phosphoric acid

Sulphuric acid

Hydrochloric acid

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Question # 6

During the combustion of fossil fuel. Which gas is ener the atmosphere.

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Nitrogen

Oxygen

Carbon di oxide

Hydrogen

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Question # 7

How many oxygen atoms are present in onw molecule of Mg(HCO3)2

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Question # 8

The age of milky way Galaxy is about.

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13.6 billion years

13.4 billion years

13.5 billion years

13.7 bilion years

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Question # 9

------------- through the food chain is one of the most important functionsof an ecosystem in maintaining balance of nature.

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Waisting of energy

Destroy fo energy

Transfer of energy

Produce of energy

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Question # 10

Bases react with acids to form water and........

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Hydrogen ions

Ammonia

Salt

Hydroxide ions

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Question # 11

Half of the increase in atmospheric carbon dioxide concentrations in the last.............. years has occured since 1980

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100

200

300

400

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