The harmful and unnecessary things present in the air are called
Air pollution
Pollutants
Water pollution
Soil
When we inhale dust we may catch cold and sneeze what is the name of this condition?
Dust allergy
Headache
Fever
Skin allergy
What need sound to propagate?
Way
Path
Medium
Direction
If dust particles fall on crops . What happened to the crops?
High yield
Medium level of yield
No yield
Low yield
If we place a sheet of white paper just above the flame for a second. What happened to the paper?
It will burn
No reaction
Blue spot on paper
Black mark seen on paper
What is the short form of Chloro-Flouro-Carbon?
C F C
C C F
F C C
C L C
We can use what type of ovans to prevent air pollution?
Smokeless ovan
Smoking ovan
Heavy ovan
None of these
If we breathe polluted air we will cause
Cough
Mental worry
Cold
Why Taj mahal and Qutub minar lost the natural colour?
Acid rain
Hydro carbon
Sulphur
What is essential for organisms to live?
Air
Carbon-dioxide
Carbon-monoxide
Oxygen
