Question

plz WITH REASON!!!!!!​

Answer 1

Answer:

4) O2 and O3

Because they are of same element

other options are just compounds.

Answer 2

Answer: the last of one O2 & O3 are allotropes.

Explanation:

• ALLOTROPES :- The existence of an element in more than one form, having the same chemical properties but different physical properties is called allotropy. The various forms of an element are called allotropes.

There are several known allotropes of oxygen. The most familiar is molecular oxygen (O2), present at significant levels in Earth's atmosphere and also known as dioxygen or triplet oxygen. Another is the highly reactive ozone (O3).

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