Question

Which of the following is NOT a compound?
A. wood
B. iron
C. water
D. air

Answer 1

Answer:

Which of the following is not a compound?

A compound is a substance which comprises of atoms or ions of more than two different elements. These elements are bound in definite proportion to form a compound. Brass is not a compound whereas washing soda, quick lime and marble are all compounds. Brass is an alloy of copper and zinc.Sep 12, 2017

Answer 2

Here, from the given options only the is it who is not a compound. So,your answer is a.wood