One which is not considered as naturally occurring greenhouse gas is

• Carbon di-oxyde

• Methane

• nitrous oxide

• ethane

The most harmful environmental pollution from nuclear reactor is

• radioactivity

• particulate formation

• thermal pollution

• Noise Pollution

Height of ozone above surface of Earth is

• 30 - 50 kms

• 10 - 20 kms

• 15 - 30 kms

• 50 - 70 kms

Ozone layer is found in ....

• Thermosphere

• Stratosphere

• Troposphere

• Mesosphere

What type of radiation is trapped on the earth's surface by the green house effect?

• UV rays

• ? -rays

• X-rays

• IR rays

Biotic environment includes

• producers

• consumers

• decomposers

• All above

Greenhouse gases which is present in very high quantity is

• Prophen

• Ethane

• Carbon di-oxide

• Methane

Color of ozone molecule is

• Blue

• White

• Pale Yellow

• Pale Green

71% of earth surface is covered with:

• Land

• Air

• Water

• Coal

Of the total water on the Earth, fresh water reserves constitute approximately-

• 70 %

• 2.7%

• 27 %

• 8.9 %