Photochemical smog pollution does not contain

• ozone

• nitrogen dioxide

• carbon dioxide

• carbon dioxide

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is:

• < 3.0 ppm

• < 10 ppm

• < 100 ppm

• < 100 ppm

Which one of the following statements is not valid for aerosols?

• They are harmful to human health

• They alter rainfall and monsoon patterns

• They cause increased agricultural productivity

• They cause increased agricultural productivity

Which of the following in sewage treatment remove suspended solids?

• Tertiary treatment

• Secondary treatment

• Primary treatment

• Primary treatment

IUCN stands for 

• Indian Union for Conservation of Nature

• International Union for Conservation of Nature

• Indian Union of Chemical Nomenclature

• International Union for the conservation of Nutrients

Which one of the following combination is incorrect?

• Rio convention → Air pollution

• Kyoto protocol  → Climate change

• Montreal Protocol → Ozone depletion

• Ramsar Convention → Wetland conservation

Soil salinity is measured by

• Porometer

• Calorimeter

• Conductivity meter

• Potometer

Which of the following species are restricted to an area?

• Sympatric species

• Sibling species

• Allopatric species

• Endemic species

Factor govering the earth surface is

• Topographic

• Edaphic

• Temperature

• Biotic

Biological treatment of water pollution is done with the help of

• Fungi

• Lichen

• Phytoplanktons

• None of the above