Which of the following statements are true for pure substances?
(i) pure substances contain only one kind of particles

(ii) pure substances may be compounds or mixtures

(iii) pure substances have the same composition throughout

(iv) pure substances can be exemplified by all elements other than nickel
A pure substance contains only one kind of atoms or molecules. It has definite composition which does not vary with time.

Question

A pure substance contains only one kind of atoms or molecules. It has definite composition which does not vary with time.

Philoid · Accepted Answer

A pure substance contains only one kind of atoms or molecules. It has definite composition which does not vary with time.