Air and water

Which of the following is not a property of air?

• Air has weight

• AIR EXERTS PRESSURE

• air expands

• Air cannot move

Which of the following supports burning?

• Nitrogen

• Carbon dioxide

• Oxygen

• Helium

Ozone layer lies in the________

• Stratosphere

• Mesosphere

• Thermosphere

Soluble impurities can be removed by ________

• filtration

• sedimentation

• decantation

• distillation

Meteoroids burn out in _________

• Exosphere

• Thermosphere

• Troposphere

• Mesospere