General Science

Which Shaheer consists of about 80% of the mass of atmosphere?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Ozone layer exists above the earth about:

• 25km

• 30km

• 35km

• 40km

Coal that contains the highest % of carbon is:-

• Lignite

• Bituminous

• Sub bituminous

• Anthracite

Which fraction or product of petroleum is used in cars as fuel?

• Petrol

• Kerosene oil

• Diesel oil

• Lubricant oil

Land converted with forest in Pakistan is only.

• 3%

• 5%

• 7%

• 9%

Carbon monoxide is produced due to complete combustion of fuel.

• True

• False

• None of them

Deforestation and rising population are becoming a cause of Global worming.

• True

• False

• None

Fertilizers cause water pollution by releasing phosphates.

• True

• False

• None

Ozone is ________ for us.

• Beneficial

• Harmful

• None

• Have not any effects

Troposphere extends from surface of earth up to ______ kilometers.

• 12 km

• 50 km

• 80 km

• None of these