Question

A student hears in chemistry class that a certain object is made of a pure substance. What can the student conclude about the object based on this information?
A. It contains only one type of atom.
B. It can be separated into different components.
C. It always takes the shape of its container.
D. It is made of either an element or a compound.
E. It is a homogeneous mixture.

Answer 1

Answer: D) It is made of either an element or a compound.

Explanation: Pure substance has a fixed composition. It can either be an element or a compound.

Element is the pure substance which is made up of similar type of atoms and cannot be broken further.

Compound is the pure substance which is made up of two or more elements combined together in a fixed ratio by mass. Compounds can be broken into its components by using chemical methods.

a) Only elements contain one type of atoms.

b) Only compounds can be separated into different components.

c) Only liquids take the shape of the container.

d) It is made of either an element or a compound.

e) Homogeneous mixtures are formed by mixing of elements or compounds in any ratio.