Question

Which of the following materials fall in the category of a "pure substance"? i) Ice ii)Milk iii) Iron iv) Wood v)Air vi) Calcium oxide



a) i), iii), vi)

b) ii), iv), vi)

c) i), ii), iii)

d) all of the above

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Answer 1

Answer:

Ice, iron, calcium oxide are pure substances ,in contrast milk is hydrochloric acid and air cannot be called pure substance because they consists of particles of more than one kind of matter.

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hope it helps uh..♥️

Answer 2

Following substance from the above mentioned list are pure substance :

$\sf\red{★Iron}$

$\sf\red{★Ice}$

$\sf\red{★Calcium\:oxide}$

So, your answer is (a)i),iii),iv)