Question

Select the correct answer. What is the chemical name of the covalent compound P4O9? A. tetraphosphorus nonaoxygen B. tetraphosphate nonoxygen C. tetraphosphide nonaoxide D. tetraphosphorus nonoxide

Answer 1

Answer : The correct option is D.

Explanation :

The rules for naming of binary molecular compound :

In the given formula, the lower group number element is written first in the name and keep its element name and the higher group number is written second.

First element in the formula is named first and keep its element name.

• Gets a prefix if there is a subscript on it such as mono for 1, di for 2, tri for 3 and so on.

Second element is named second.

• Use the root of the element name, if it is an anion then use suffix (-ide).

• Always use a prefix on the second element such as mono for 1, di for 2, tri for 3 and so on.

Therefore, the chemical name of compound $P_4O_9$ is Tetra-phosphorous nonoxide.