pollution of air and water

A thick fog-like layer in the atmosphere, especially during winters is called -----------

• smog

• fog

• smoke

• smof

if we combine the two longest rivers in the world it will be equal to the registered vehicles in Delhi if they are lined up one after other. What is the name of the these rivers.

• Ganga & Nile rivers

• Nile & Amazon rivers

• Yamuna & Amazon rivers

• Yellow & Amazon rivers

The substance which contaminate the air is called air pollution

• True

• False

Full form of CNG, LPG

Which is the gas produced from incomplete burning of fuels such as petrol and diesel ?

• CFCs

• Carbon

• Carbon monoxide

• sulphur dioxide

side effect if we breath carbon monoxide :

reduced the oxygen-carrying capacity of the blood

• True

• False

name the oxide that smoke contains and combines with fog and other air pollutants to create smog.

• oxides of carbon

• oxides of iron

• oxides of nitrogen

• oxides of copper

----------- are a major source of gaseous pollutants like sulphur dioxide and nitrogen dioxide

• oil refineries

• mines

• vehicles

• automobiles

the trapping of radiations by the earth's atmosphere is similar to the green house that absorbs the sun's heat and do not let it out. what is the name of the effect?

• global warming effect

• greenhouse effect

• carbon affect

• heat trap effect

• None of these

CFCs are used in refrigerators, air conditioners, aerosol sprays but damages the oxygen layer in the atmosphere

• true

• false