HARD
6th CBSE
IMPORTANT
Earn 100

Which gas is used in a fire extinguisher? What will happen if it is replaced with oxygen?

Important Questions on Air

MEDIUM
6th CBSE
IMPORTANT
Science Spark>Chapter 16 - Air>HOTS>Q 2
Some wet iron wool was placed in a test tube. The test tube was inverted and kept in a beaker of water. After a week it was noticed that the level of air column has reduced. Why did this happen?