Question

9. Which of the following are pure substances?
Iron, Calcium, Wood, Air, Ice, Milk​

Answer 1

Explanation:

A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample.

Calcium, Ice and Iron are pure substances

Answer 2

Following substance from the above mentioned list are pure substance :

$\sf\red{★Iron}$

$\sf\red{★Ice}$

$\sf\red{★Calcium}$