Question

1. which of following is a compound? k ch₄ h₂ o₂

Explanation:

A compound is a substance made up of two or more different elements chemically combined. K is potassium, an element. H₂ and O₂ are molecules of elements (hydrogen and oxygen respectively). CH₄ (methane) is composed of carbon and hydrogen atoms chemically bonded, so it is a compound.

Answer:

CH₄