Benzoyl peroxide on heating at 80° C gives carbonium ion carbanion carbene free radical

Benzoyl peroxide on heating at 80° C gives free radical.

Here's the step by step explanation:

1. Benzoyl peroxide is an organic compound that is often used in acne treatments, but it also has other uses. Its chemical formula is (C6H5CO)2O2.

2. When benzoyl peroxide is heated at 80° C, it decomposes. The process of decomposition involves breaking down the compound into simpler substances.

3. The decomposition of benzoyl peroxide results in the formation of two phenyl (C6H5) free radicals and one molecule of oxygen (O2).

4. A free radical is a molecule that has an unpaired electron, which makes it highly reactive. In this case, the phenyl free radicals can go on to react with other substances.

So, the correct answer is "free radical".