Question

‌Are‌ ‌white‌ ‌and‌ ‌yellow‌ ‌phosphorus‌ ‌allotropes?‌

Answer 1

Phosphorus is a chemical element with atomic number $15$ and the symbol P. Phosphorus occurs in two main forms: white phosphorus and red phosphorus, but it is never present as a free element on Earth due to its high reactivity.

Complete answer:
Allotropy is the study of an element's occurrence in multiple or multiple physical forms. The different physical forms of the same element are known as allotropes. Allotropy is a property that several elements have. Different physical properties are shown by these allotropes. Their chemical properties, on the other hand, are comparable.
White Phosphorus is a typical phosphorus allotrope. White phosphorus is a transparent and waxy solid. It is very fragile and must be treated with care. It is water insoluble. Carbon disulphide or carbon tetrachloride, on the other hand, dissolve it. It decomposes in boiling caustic soda in the presence of latent air, yielding sodium hypophosphite and phosphine.
At $195.2$ K, it transforms reversibly into the $\beta$ form, which has a body-centered cubic crystal structure. The crystal structure of the $\beta$ form is thought to be hexagonal. When exposed to light, white phosphorus is a transparent waxy solid that easily turns yellow. As a result, it's also known as yellow phosphorus.
When exposed to light, white phosphorus is a transparent waxy solid that easily turns yellow. As a result, it's also known as yellow phosphorus. When exposed to oxygen, it glows greenish in the dark and is extremely flammable and pyrophoric (self-igniting) when in contact with air.
So we can say that White and Yellow phosphorus are allotropes.

Note:
Yellow phosphorus is commonly used around the world to make phosphoric acid, phosphates, flame retardants, detergents, water treatment, and metal surface treatment, among other things. A significant volume of phosphorus sludge is released into the atmosphere during the processing of yellow phosphorus, polluting the environment.