Question 1

What is the most important indicator that a chemical change has occurred?

Accepted Answer

a new substance is formed

Answer

it gives off heat

Answer

it changes color

Answer

it changes phases

Question 2

How many carbon atoms in brown sugar?  (C12H22O11)

Accepted Answer

12

Answer

22

Answer

1

Answer

11

Question 3

Which of the following is a covalent bond?

Accepted Answer

hydrogen and oxygen

Answer

Copper and Zinc

Answer

Potassium and Chlorine

Answer

sodium and chlorine

Question 4

How many carbon atoms in this formula?  3C12H22O11

Accepted Answer

36

Answer

12

Answer

15

Answer

11

Question 5

What is  melting crayons an example of?

Accepted Answer

physical change

Answer

chemical change

Answer

nuclear change

Answer

chemical reaction

Question 6

What makes chemical bonds break?

Accepted Answer

molecules bump into each other with a lot of energy

Answer

substances are combined in a solution

Answer

liquid dissoliving solids

Answer

temperature change

Question 7

Is the following equation balanced?

Accepted Answer

Yes

Answer

No

Question 8

What is an example of a physical change

Accepted Answer

phase change

Answer

leaves changing colors

Answer

fireworks exploding

Answer

burning a match

Question 9

How do chemical bonds break?

Accepted Answer

when molecules have enough energy, bump into each other and break

Answer

making a solution

Answer

forming a precipitate

Answer

lowering the temperature

Question 10

What is the charge of an ionic compound?

Accepted Answer

0

Answer

3

Answer

1

Answer

2

Question 11

Which of the following is an ionic compound?

Accepted Answer

MgO

Answer

Cl2

Answer

O2

Answer

CH4

Question 12

How many oxygen atoms are present in the equation 4Mg + 3(O2) ----- 2(Mg2O3)

Accepted Answer

6

Answer

4

Answer

2

Answer

3

Question 13

What would decrease the rate of a chemical reaction?

Accepted Answer

adding an inhibitor

Answer

adding a catalyst

Answer

increasing the surface area of a substance

Answer

increasing the temperature

Question 14

Which of the following is a catalyst?

Accepted Answer

lowers the activation enery of a reaction

Answer

changes the reaction permenantly

Answer

slows the rate of reaction

Answer

stops a reaction

Question 15

What is the law of conservation of mass?

Accepted Answer

atoms are never gained or lost in a reaction

Answer

the reactants have more mass than the products

Answer

atoms are created and destroyed

Answer

the products will have more mass than the reactants

Question 16

What will increase the rate of a chemical reaction?

Accepted Answer

making the solid into a powder

Answer

lowering the temperature

Answer

decrease the concentration

Question 17

Which side the equation are the reactants written?

Accepted Answer

left

Answer

right

Question 18

Acids will

Accepted Answer

taste sour

Answer

feel slippery

Answer

turn litmus paper blue

Answer

be used in cleaning products

Question 19

A base will turn litmus paper

Accepted Answer

blue

Answer

red

Answer

orange

Answer

yellow

Question 20

What happens when acids and bases combine?

Accepted Answer

neutralize each other

Answer

become more acidic

Answer

turn red

Answer

explode

Question 21

What is the pH of pure water?

Accepted Answer

7

Answer

5

Answer

3

Answer

8

Question 22

What substance produces hydrogen gas when it reacts with a metal?

Accepted Answer

acid

Answer

base

Question 23

What substance feels slippery like soap?

Accepted Answer

base

Answer

acid

Question 24

What will produce a strong acid?

Accepted Answer

when the majority of the molecules break apart when dissolved in water

Answer

when a few molecules break apart when dissolved in water

Question 25

What is created when an acid and base neutralize?

Accepted Answer

salt and water

Answer

gas

Answer

stronger base

Answer

stronger acid

Question 26

What has a lower pH?

Accepted Answer

strong acid

Answer

strong base

Answer

weak acid

Answer

weak base

Question 27

Acids are

Accepted Answer

corrosive

Answer

bitter tasting

Answer

slippery

Answer

mild

Question 28

Most compounds are

Accepted Answer

covalent

Answer

organic

Answer

ionic

Answer

metallic

Question 29

Acids are able to conduct electrical currents because they form

Accepted Answer

hydronium ions

Answer

hydrochloric acid

Answer

hydroxide ions

Answer

hydrogen gas

Question 30

Hydronium ions are

Accepted Answer

H3O+

Answer

OH-

Answer

H+

Answer

H2O

Question 31

What is a synthesis reaction?

Accepted Answer

A + B = AB

Answer

AD + BC = AB + CD

Answer

A + BC = B + AC

Answer

AB = A + B

Question 32

A compound that can reversibly change color depending on its pH is

Accepted Answer

an indicator

Answer

a catalyst

Answer

pH

Answer

an inhibitor

Question 33

The value that is used to express acidity or alkalinity is

Accepted Answer

pH

Answer

indicator

Answer

inhibitor

Answer

catalyst

Question 34

A compound that can speed up a reaction

Accepted Answer

catalyst

Answer

pH

Answer

indicator

Answer

inhibitor

Question 35

A compound that can slow down or stop a reaction is

Accepted Answer

inhibitor

Answer

indicator

Answer

pH

Answer

catalyst

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