Helium is used in observation of ballons because it is?
-
A.
Light and combustible -
B.
light and non-combustible -
C.
heavy and combustible -
D.
heavy and non-combustible
Correct Answer: Option B
Explanation
Helium floats because it is buoyant; its molecules are lighter than the nitrogen and oxygen molecules of our atmosphere and so they rise above it
There is an explanation video available below.