Question 1

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

Accepted Answer

Burning a piece of wood

Question 2

Which property is a chemical property?

Accepted Answer

Flammability

Question 3

A sample of gold is hammered into a thin sheet. This is an example of:

Accepted Answer

A physical change

Question 4

Which of the following is a heterogeneous mixture?

Accepted Answer

Milk

Question 5

Which of the following is a pure substance?

Accepted Answer

Oxygen gas

Question 6

Which of the following is a reversible physical change?

Accepted Answer

Freezing water to make ice

Question 7

Which of the following is NOT a physical property?

Accepted Answer

Reactivity with acid

Question 8

A cube of silver has a density of $$10.5\ \mathrm{g/cm^3$}$$ and measures $$5.00\ \mathrm{cm} on $$each side. What is its mass in kilograms?

Accepted Answer

$$1.31\ \mathrm{kg}$$

Question 9

Which of the following is a correct SI base unit and its symbol?

Accepted Answer

Length - m

Question 10

Which of the following is a chemical property of hydrogen gas?

Accepted Answer

It reacts explosively with oxygen gas

Question 11

A student mixes two clear solutions and observes the formation of a solid. This is evidence of:

Accepted Answer

A chemical change

Question 12

Which of the following is an extensive property?

Accepted Answer

Mass

Question 13

Which of the following is the correct formula for the volume of a cylinder?

Accepted Answer

$$V = \pi r^2$ h$$

Question 14

A sample of copper wire has a mass of $$7.5\ \mathrm{g}$$ and a volume of $$0.84\ \mathrm{cm^3$}. $$What is the density of copper?

Accepted Answer

$$8.9\ \mathrm{g/cm^3$}$$

Question 15

Which of the following is an example of an irreversible change?

Accepted Answer

Burning paper

Question 16

Which of the following is a correct conversion factor?

Accepted Answer

1 inch = 2.54 cm

Question 17

A student heats a sample of water from $$20^\circ\mathrm{C} to$$ $$100^\circ\mathrm{C}. $$Which of the following best describes this process?

Accepted Answer

It is a physical change

Question 18

Which of the following is a correct statement about compounds?

Accepted Answer

They can only be broken down by chemical means

Question 19

A graduated cylinder contains $$25.0\ \mathrm{mL} of $$water. After a metal object is submerged, the water level rises to $$32.0\ \mathrm{mL}. $$What is the volume of the object?

Accepted Answer

$$7.0\ \mathrm{mL}$$

Question 20

Which of the following is a correct statement about the mole?

Accepted Answer

It is a counting unit for particles

General Chemistry Study Guide: Physical & Chemical Changes, Properties, Density, and Water Displacement

Guida di studio - Domande di pratica

Study guide - Flashcard