Question

Clevite is a source of:
A.helium
B. argon
C. xenon
D. none of these

Answer 1

Hint: Cleveite could be an impure radioactive substance which is a sort of uraninite containing uranium, and generally found in Norway.

Complete Solution :
Noble gas is any of the seven chemical elements that produces up Group 18 (VIIIa) of the tabular array of elements. The noble gases are neon (Ne), helium (He), krypton (Kr), argon (Ar), xenon (Xe), radon (Rn), as well as oganesson (Og).
- The noble gases are the chemical elements present in group 18 of the tabular array of elements. They're the foremost stable as they need the most number of valence electrons present in their valence shell . Therefore, they rarely react with other elements as they have already got stable electronic configuration in octet.
- The noble gases, in ascending order of their density, are helium, neon, argon, krypton, xenon and radon. they're called noble gases because they're so majestic that, in general, they do not react with the other compounds. For this reason they're known as inert gases as they're inert in nature.
- Other characteristics of the noble gases include that all of them conduct electricity, fluorescence, they are odorless and colorless, and that they are utilized in many conditions when a stable element is required to keep up a secure and secure environment.
- When exposed to the atmosphere, the noble gases get dissolved in seawater. For every argon, these solubility concentrations become a function of temperature, salinity, and pressure.
Helium is obtained from the compound clevite.
So, the correct answer is “Option A”.

Note: It is to be noted that helium is that the only chemical element with 2 valence electrons. It's also the primary chemical element in their group.