Question

which of these is not an inactive gas
a. argon
b. helium
c. Krypton
d. Oxygen​

Answer 1

Question :

Which of these is not an inactive gas?

a. Argon

b. Helium

c. Krypton

d. Oxygen

Answer :

d. Oxygen

Explanation :

All noble gases, which belongs to 18th group of periodic table, e.g. Helium, Neon, Argon, etc., are inert gases and are said to be inactive gases. As oxygen isn't a noble gas, Oxygen is the Answer.

Thanks ❤