POLLUTION OF AIR AND WATER

What is the percentage of oxygen present in air?

• 20.10%

• 78.08%

• 0.97%

• 20.95%

• 21.95%

CFC is also called ____

• foners

• freons

• froen

• cfc

Tags

NGSS.MS-ESS3-4

NGSS.MS-PS1-3

Discharge of treated industrial sewage into water bodies causes water pollution

• TRUE

• FALSE

Tags

NGSS.MS-ESS3-3

Which of the following is not a greenhouse gas ???

• Carbon dioxide

• Methane

• Sulphur dioxide

• Nitrogen

Carbon monoxide is released from the combustion of fossil fuels.

• FALSE

• TRUE

• MAYBE

Which of the following is major source of water pollution?

• Industrial wastes

• Untreated sewage

• Use of fertilizers

• Toxic metals

Tags

NGSS.MS-ESS3-4

NGSS.MS-ESS3-3

A chemical method used for purifying water is :

• Filtration

• Chlorination

• Decantation

• None of these

The most widely used solvent is

• Air

• Acid

• Nitrogen

• Water

Water shortages can be created by

• Human consumption

• Weather related issues like drought

• Human withdrawal

• All of these reasons

Tags

NGSS.MS-ESS3-4

______________________ is the process of removing the salt from ocean water.

• Desalination

• Filtration

• Decantation

• Distillation