Question

Answer the following.

Distinguish between rhombic sulfur and monoclinic sulfur.

Answer 1

The following are the points of difference between rhombic (α-sulfur) and monoclinic (β - sulfur):

Rhombic sulfur (α-sulfur)	Monoclinic sulfur (β- sulfur)
1. It is a pale yellow coloured solid.	1. It is bright yellow solid
2. It forms orthorhombic crystals	2. It forms needle-shaped monoclinic crystals
3. Its melting point is 385.8 K.	3. Its melting point is 393 K.
4. Its density is 2.06 g/cm3	4. Its density is 1.98 g/cm3
5. It is insoluble in water and soluble in CS2	5. Soluble in CS2
6. It is stable below 369 K and transforms to β-sulfur above this temperature	6. It is stable above 369 K and transforms into α-sulfur below this temperature.
7. It is prepared by the evaporation of rolls sulfur in CS2.	7. It is prepared from rhombic sulfur.