Question # 1

It is used in microprocessor of computer

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chromite

aluminium

silicon

iron

The rock from which minerals can be obtained are called:

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silicons

ores

metals

gem stone

Ultra violet radiations can cause.

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Cancer

Eye disease

None

Both a and b

Water pollution can cause.

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Cholera

Typhoid

Cancer

Both a and b

At present average annual population growth rate in Pakistan is 2.6 percent. In how many year it will become double?

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47 year

37 year

17 year

27 year

Major cause of depletion of zone layer is.

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Oxygen

Hydrogen

Chlorofluorocarbons

Hydrocarbons

The height of troposphere above earth's surface is

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10 km

18 km

20 km

40 km

The height of Stratosphere form sea level is.

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50 km

55 km

60 km

45 km

Water polythene bags can cause.

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Cholera

Choking of drains

Cancer

Typhoid

The temperature in measophere can be low as.

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-150 ^oC

-100^oC

100 ^oC

-200 ^oC

Thickness of atmosphere is.

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200 km

1000 km

1200 km

1600 km

Where the ozone make a protective layer?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

The percentage of carbon dioxide in Air is:

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40%

0.4%

0.04%

33%

The percentage of oxygen in Air is

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78%

21%

0.04%

33%

Meat and eggs are rich in

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carbohydrates

proteins

glucose

vitamin

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