In Which Compound Does Phosphorus Have an Oxidation Number of 3

question 36

Multiple Choice

In which compound does phosphorus have an oxidation number of 3+?

• A)AlPO₄
• B)PF₅
• C)H₃PO₄
• D)H₃PO₃
• E)PH₃

---

Definitions:

Respiratory System

The body system consisting of organs and structures responsible for gas exchange, allowing for inhalation of oxygen and exhalation of carbon dioxide.

Urinary System

The body's drainage system for the eventual removal of urine, comprising of organs such as kidneys, ureters, bladder, and urethra.

Homeostasis

The process by which biological systems maintain a stable internal environment despite changes in external conditions.

Control Center

A central part of a system, such as the brain in the human body, that regulates the body's responses to stimuli and maintains homeostasis.