Question

The compound formed upon combustion of potassium metal in excess air is

• A. $K_{2}O_{2}$
• B. $KO_{2}$
• C. $K_{2}O$
• D. $KOH$

Answer 1

Answer: (B)

$KO_{2}$

Answer 2

The compound formed upon combustion of potassium metal in excess air is potassium superqxide.
$K \stackrel{ O _{2}}{\longrightarrow} \underset{\text { Oxide }}{ K _{2} O } \stackrel{ O _{2}}{\longrightarrow} \underset{\text { Peroxide }}{ K _{2} O _{2}} \stackrel{ O _{2}}{\longrightarrow} \underset{\text { Superoxide }}{ KO _{2}}$