Multiple Choice
Which of the following is classified as a compound?
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1. Intro to General Chemistry
Classification of Matter
Multiple Choice
Which of the following media can be described precisely as to its chemical content?
A
A colloid such as milk
B
A pure substance such as distilled water
C
A heterogeneous mixture such as soil
D
A solution such as seawater
Verified step by step guidance1
Understand the definitions of the different types of media: a pure substance, a solution, a colloid, and a heterogeneous mixture.
Recall that a pure substance has a fixed and definite chemical composition, meaning its chemical content can be described precisely.
Recognize that a solution, while homogeneous, is a mixture of substances and its exact composition can vary, so it cannot always be described precisely without detailed analysis.
Know that a colloid (like milk) and a heterogeneous mixture (like soil) have variable compositions and phases, making their chemical content difficult to describe precisely.
Conclude that among the options, only a pure substance such as distilled water has a precisely definable chemical content.
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