Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements that are chemically bonded together.

Question 2

Which of the following is an example of a homogeneous mixture?

Accepted Answer

A cup of black coffee

Question 3

Which statement about elements is correct?

Accepted Answer

Elements are pure substances composed of only one kind of atom.

Question 4

Which of the following substances is a pure substance?

Accepted Answer

Crystalline sugar

Question 5

Which of the following mixtures is classified as heterogeneous?

Accepted Answer

Seawater (unfiltered)

Question 6

Which of the following statements is true?

Accepted Answer

All mixtures are classified as homogeneous or heterogeneous.

Question 7

A gold bar is best classified as which of the following?

Accepted Answer

Element

Question 8

Which of the following is NOT a mixture?

Accepted Answer

Crystalline sugar

Question 9

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 10

Which process can be used to separate a homogeneous mixture?

Accepted Answer

Distillation

Question 11

Which of the following best describes matter?

Accepted Answer

Anything that has mass and occupies space.

Question 12

Which of the following is a compound?

Accepted Answer

Ammonia, $$\mathrm{NH_3$}$$

Question 13

Which of the following is a heterogeneous mixture?

Accepted Answer

A bowl of cereal with milk

Question 14

Which of the following is NOT a pure substance?

Accepted Answer

Salsa

Question 15

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 16

Which of the following is a correct classification for seawater (unfiltered)?

Accepted Answer

Heterogeneous mixture

Question 17

Which of the following is a homogeneous mixture?

Accepted Answer

Wine

Question 18

Which of the following is true about compounds?

Accepted Answer

Compounds can be separated into elements by chemical means.

Question 19

Which of the following is an example of a variable composition?

Accepted Answer

Soda

Question 20

Which of the following is NOT a correct statement about mixtures?

Accepted Answer

Mixtures are always homogeneous.

Classification of Matter and Mixtures: GOB Chemistry Study Guide

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