Phosphorus

(i) white phosphorus (ii) red phosporus and (iii) balck phosphorus. Write the difference between white red and black phosphorus on the basis of their structure and reactivity. Phosphorus has three allotropic forms __

(a)What happens when white phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO_(2) ? (b)Draw the structure of white phosphorus and red phosphorus. Which one of these two types of phosphorus, is more reactive and why ?

Given below is a phosphorus cycle. Select the incorrect statements from the following: (i) It represents phosphorus cyclic in an aquatic ecosystem. (ii) It represents phosphorus cyclic in a terrestrial ecosystem. (iii) The natural reservoir of phosphorus is forest ecosystem. (iii) The natural reservoir of phosphorus is forest rocks. (iv) There is a respiratory release of phosphorus into the atmosphere. (v) Gaseous exchange of phosphorus between organisms and the environment does not occur.