Question

12. According to the definition of pure substance, which of the following is a pure substance? (a) Ice (b) Mercury (c) Iron (d) All of these

Answer 1

mercari is the pure substance I've given you right answer so Mark me as Brainlest

Answer 2

Following substance from the above mentioned list are pure substance :

$\sf\red{★Iron}$

$\sf\red{★Ice}$

$\sf\red{★Mercury}$

So, your answer is (d) All of these