Helium is preferred to hydrogen in filling balloons becau...
Helium is preferred to hydrogen in filling balloons because hydrogen
is inflammable
is diatomic
exhibits isotopy
is a component of water
Correct answer is A
Helium is a colorless, non-toxic, non-flammable gas that is lighter than air. When balloons are filled with helium, they will float.
What type of reaction is involved in the formation of alkanols from alkenes? ...
In the diagram above the activation energy is represented by ...
A noble gas with a high power of fog penetration used in aerodrome beacons is? ...
Which of the following gases will bleach moist litmus paper? ...
What is the atomic number of Beryllium? ...