Which of the following is the strongest oxidising agent?

Correct answer: (c) F₂

Explanation

An oxidising agent takes electrons. Among the halogens, the oxidising power decreases down the group:

F₂ > Cl₂ > Br₂ > I₂

Fluorine is the most electronegative element and has a very small atom, so it takes electrons most readily. It is the strongest oxidising agent among the elements: it can oxidise chloride, bromide and iodide ions to their halogens.