Quiz about Chemical Reactions Review

Question 1

Match the image to the correct word.

Accepted Answer

Substance

Answer

Atom

Answer

Molecule

Answer

Extended Structure

Question 2

Match the image with the correct word.

Accepted Answer

Atom

Answer

Molecule

Answer

Extended Structure

Answer

Substance

Question 3

Match the image with the correct word.

Accepted Answer

Molecule

Answer

Atom

Answer

Extended Structure

Answer

Substance

Question 4

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

Accepted Answer

Burning wood

Answer

Mixing salt and water

Answer

Boiling water

Answer

Melting ice

Question 5

Which of the following examples represents a physical change?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 6

When sugar dissolves in water a ______________ change occurs.

Accepted Answer

Physical change

Answer

Chemical Change

Question 7

What is the definition of chemical change?

Accepted Answer

any change that results in the formation of one (or more) new chemical substance(s).

Answer

changing of only the appearance of the object

Answer

matter cannot be created or destroyed, only change form

Answer

changes affecting the form of a chemical substance, but not its chemical composition.

Question 8

Which is a way that a piece of paper can go through a chemical change?

Accepted Answer

burn the paper with fire

Answer

fold the paper in half

Answer

soak the paper in water

Answer

cut the paper with scissors

Question 9

Baking soda and vinegar combine to make carbon dioxide

Accepted Answer

Chemical Change

Answer

Physical Change

Question 10

Tiny pieces of matter that everything is made of

Accepted Answer

atoms

Answer

model

Answer

substances

Question 11

Something that can be observed about a substance, such as color, smell, or boiling point

Accepted Answer

property

Answer

reactant

Answer

molecule

Question 12

Something that is made of all the same atoms or groups of atoms

Accepted Answer

substance

Answer

atoms

Answer

scale

Question 13

During a chemical reaction, atoms can

Accepted Answer

be rearranged to form a new substance

Answer

be destroyed to form a new substance

Answer

be created to form a new substance

Question 14

This image shows a

Accepted Answer

chemical reaction

Answer

physical change

Answer

musical change

Answer

all of these answers are correct

Question 15

Signs of a chemical change could be:

Accepted Answer

all of these answers are signs of chemical change

Answer

a change in energy (temperature, light, sound)

Answer

a precipitate forms (a solid forms from 2 liquids)

Answer

formation of gas (bubbles)

Answer

shocking change in color

Question 16

The products are:

Accepted Answer

2 carbon monoxide

Answer

molecular oxygen and 2 carbon

Answer

all of these are products

Answer

all of these are reactants

Question 17

In a chemical reaction, are the reactants the beginning substances or the ending substances?

Accepted Answer

beginning

Answer

ending

Question 18

In a chemical reaction, are the products the beginning substances or the ending substances?

Accepted Answer

ending

Answer

beginning

Question 19

The blue numbers in the image below represent ________

Accepted Answer

subscripts

Answer

coefficients

Question 20

True or False

In a chemical reaction, no new types of atoms are created, and no atoms are destroyed.

Accepted Answer

true

Answer

false

Question 21

How many sulfur atoms are present in this molecule?

Accepted Answer

3

Answer

4

Answer

12

Answer

1

Question 22

Is it possible for these reactants to become this product?

Accepted Answer

Yes, because the type and number of atoms are the same, just rearranged differently

Answer

No, because no new types of atoms were made

Answer

No, because none of the atoms were destroyed

Answer

Yes, because new types of atoms were created

Question 23

Did a chemical reaction happen?

Accepted Answer

Yes, because the atoms of the reactants rearranged to form the new products

Answer

Yes, because new types of atoms were created to form the new products.

Answer

No, because none of the atoms were destroyed

Answer

No, because the atoms of the reactants stayed together

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