Question

Which of the following is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide?
A. P(s) + O2(g) --> P2O5(s)

B. P2O5(s) --> P2(s) + O2(g)

C. P(s) + O(g) --> P5O2(g)

D. P(s) + O2(g) --> PO2(g)

Answer 1

Answer: Option (A) is correct.

Explanation:

In diphosphorus pentoxide there will be two phosphorous atoms and 5 oxygen atoms according to its name.

Therefore, the formula for diphosphorus pentoxide will be $P_{2}O_{5}$ and it is a solid.

Thus, the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide will be as follows.

                 $P(s)+ O_{2}(g) \rightarrow P_{2}O_{5}(s)$