Which of the following examples are correctly matched with their chemical classification? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

22-carat gold is an alloy of gold and other metals (like copper), making it a homogeneous mixture. Dry ice is solid $CO_2$, a pure compound. Ozone ($O_3$) consists of only oxygen atoms, making it a pure element. Brass is an alloy (homogeneous mixture), so classifying it as heterogeneous is incorrect.