Question

Rhombic sulphur is the most stable allotropic form of sulphur.
(a) True
(b) False

Answer 1

Hint: One should recall that there are two allotropic forms of sulphur: Rhombus and monoclinic. It should also be noted that one of the forms converts into another due to a very stable shape formation.

Complete Step by Step Solution:
Firstly, we need to discuss a bit about the allotropic form. So, what actually is allotropic form? Basically, an element could exist in one or more than one physical forms in its existence. These different forms are termed as Allotrope of the element.
Sulphur chiefly exists in two types of allotropes: Rhombic and Monoclinic structures. Out of these, the yellow rhombic allotrope of sulphur which is also called as α-sulphur is the steadiest and the most robustly stable allotrope of sulphur. The rhombic structure gets changed over to monoclinic which is also termed as β-sulphur when the rhombic structure is warmed at a temperature higher than 370 K and above.
Rhombic sulphur is likewise called octahedral sulphur. The chemical structure of the same is made below:
Therefore, the solution for the above true or false problem which actually comes in the category of solid chemistry is true which essentially option number A is.

Note: An interesting fact about rhombic sulphur is that it is immiscible in water whereas it is completely miscible in organic solvents such as Benzene, ether and others such as alcohol.