Question

_______ sulphur has no sharp melting points.(Fill in the blank).

Answer 1

Hint: We have to know that sulphur belongs to group 16. Sulphur is non-metal. We obtain sulphur as a by -product after the synthesis of natural gas. There are three allotropic forms of sulfur: Rhombic sulfur, monoclinic sulfur, and amorphous sulfur. Rhombic sulfur is called alpha sulfur, monoclinic sulfur is called beta sulfur, and amorphous sulfur is called gamma sulfur.

Complete answer:
We have to know that amorphous sulfur is called plastic sulfur. The other name of amorphous sulfur is gamma sulfur. We have to know that plastic sulfur is an elastic substance, which is produced when molten sulfur is poured into cold water. We can say plastic sulfur is supercooled liquid. It appears like dark brown rubber like mass that could be pressed between fingers, hence it is known as plastic sulfur. We have to know that plastic sulfur is insoluble in carbon disulfide. Plastic sulfur is not stable at all temperatures. We have to know that plastic sulfur contains no sharp melting points. We can prepare plastic sulfur by rapid cooling of molten sulfur by pouring it into cold water. The formation of yellow rubbery ribbons of sulfur takes place. Plastic sulfur is very soft and could be stretched easily.

Note:
 The other allotropes of sulfur are colloidal sulfur, milk of sulfur, amorphous sulfur, insoluble sulfur, fibrous sulfur etc. Let us discuss some of the uses of sulfur:
-We can use sulfur in vulcanization of rubber
-We can use sulfur in insecticides in crops
-It is used in manufacturing bleaching agents
-We can use sulfur in the production of carbon disulfide that is used as skin ointments