Question # 1

Building and Monuments lose their beauty and shine due to

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U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

In the troposphere (lowest layer), the temperature decreases form 17°C to;

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-58°C

-93°C

-61°C

-49°C

Which gas saves the surface of earth from ultra violet radiation?

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CO₂

CO

N₂

O₃

Which gas is not present in atmosphere?

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Nitrogen

Oxygen

Helium

Carbon dioxide

Atmosphere has regions.

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One

Two

Three

Four

Atmospheric region found between 50-58 km from the earthis.

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Thermosphere

Stratosphere

Mesophere

Thermosphere

Cause of global warming is :

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CO₂ gas

SO₂gas

NO₂gas

O₂gas

Which gas is responsible in warming the atmosphere?

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Nitrogen

Hydrogen

Helium

Fluorine

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

ozone depletion (i.e O3--------------> O2 + O) occurs in:

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lower stratosphere

middle stratosphere

upper stratosphere

troposphere

___________ is not green house effect.

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Increase of food chain

increase atmospheric pressure

Increase of sea level

Increase of flood risks

Which metal present in acid rain affect the aquatic life by clogging fish gills?

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Lead

Chromium

Aluminium

Mercury

Effects of ozone depletion are following except the one.

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Increases infectious diseases

Increases crops production

Can cause skin cancer

Can cause climatic changes.

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