Question 1

Which of the following best describes a compound?

Accepted Answer

A pure substance composed of two or more elements in fixed, definite proportions.

Question 2

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

Accepted Answer

Orange juice with pulp

Question 3

Which property is NOT a physical property?

Accepted Answer

Reactivity with oxygen

Question 4

Which of the following changes is a chemical change?

Accepted Answer

Burning a log

Question 5

Which of the following is evidence that a chemical change has occurred?

Accepted Answer

Formation of a precipitate

Question 6

Which of the following statements about energy is correct?

Accepted Answer

Energy can be transferred from one object to another.

Question 7

Which equation correctly represents the potential energy of an object at height $$h$$?

Accepted Answer

$$PE = mgh$$

Question 8

A sample of matter has a definite volume but an indefinite shape. Which state of matter is this?

Accepted Answer

Liquid

Question 9

Which of the following is a pure substance?

Accepted Answer

Helium

Question 10

Which process is an example of an exothermic reaction?

Accepted Answer

Burning sugar

Question 11

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture with uniform properties throughout

Question 12

Which of the following is a chemical property?

Accepted Answer

Reactivity with chlorine gas

Question 13

Which of the following is NOT a property of gases?

Accepted Answer

Definite volume

Question 14

Which of the following is an example of a physical change?

Accepted Answer

Tearing paper

Question 15

Which of the following is a correct statement about the law of conservation of energy?

Accepted Answer

Energy is neither created nor destroyed.

Question 16

Which of the following is a form of potential energy?

Accepted Answer

Chemical energy

Question 17

Which of the following is a sign that a chemical reaction has occurred?

Accepted Answer

Formation of a new solid (precipitate) in a solution

Question 18

Which of the following is a correct formula for kinetic energy?

Accepted Answer

$$KE = \frac{1}{2}mv^2$

Question 19

Which of the following is a correct statement about the compressibility of liquids?

Accepted Answer

Liquids are incompressible.

Question 20

Which of the following is an example of a compound?

Accepted Answer

Table salt (NaCl)

Chapter 1: Matter and Energy – Structured Study Notes

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