9 Chemistry Revision - MSHS

Multiple Choice

Both elements and compounds are pure substances.

• Agree

• Disagree

Multiple Choice

Two or more different elements chemically combine to form compounds.

• Agree

• Disagree

Multiple Choice

Located on the Periodic Table

• Elements

• Compounds

• Both

Multiple Choice

This picture represents which of the following?

• element

• compound

Multiple Choice

This picture represents which of the following?

• element

• compound

Multiple Choice

This picture represents which of the following?

• element

• compound

Multiple Choice

This picture represents which of the following?

• element

• compound

Multiple Choice

What is the atomic # of iron?

• 55

• 56

• 26

• 2

Multiple Choice

How many protons does krypton have?

• 84

• 36

• 48

• 8

Multiple Choice

How many electrons does oxygen have?

• 8

• 16

• 2

• 15

Multiple Choice

How many neutrons does lithium have?

• 3

• 4

• 6

• 7

Multiple Choice

How many neutrons are in magnesium?

• 12

• 24

• 25

• 36

​Physical and chemical changes

Multiple Choice

What kind of change is a burning candle?

• chemical change

• physical change

Multiple Choice

What kind of change is a frying egg?

• chemical change

• physical change

Multiple Choice

Cutting a pizza into 8 separate slices is what type of change?

• chemical change

• physical change

Multiple Choice

Ice cream melting is what type of change?

• chemical change

• physical change

Multiple Choice

• chemical change

• physical change

Multiple Choice

A(n) ______ is a substance with a pH less than 7.

• Acid

• Alkaline

• Base

• Buffer

Multiple Choice

What is the only substance with a neutral pH of 7?

• Milk

• Orange Juice

• Water

• Blood

Multiple Choice

A(n) _______ is a substance with a pH greater than 7.

• Base

• Acid

• Buffer

• Water

Multiple Choice

A solution with a pH of 3.6 would be...

• Acid

• Base

• Neutral

• Acid and Base

Multiple Choice

A solution with a pH of 8.1 would be...

• Strong acid

• Weak acid

• Strong base

• Weak Base

Multiple Choice

Bleach is a strong base, what is the pH level of bleach?

• 13

• 9

• 1

• 2

Multiple Choice

What is a substance produced during a chemical reaction?

• product

• reactant

• law of conservation of mass

• chemical reaction

Multiple Choice

What is a substance that takes part in and undergoes a change during a reaction?

• product

• coeffiient

• reactant

• chemical formula

Multiple Choice

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.

• Matter can only be lost in a chemical reaction.

• Matter can only be gained in a chemical reaction.

• Matter can be gained and lost in a chemical reaction. 

Multiple Choice

According to the law of conservation of mass if I have reactants starting out with a total of 6g, what will be the mass of the products?

• 1g

• 3g

• 6g

• 12g

Multiple Choice

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

Multiple Choice

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

Multiple Choice

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!

• No!

Multiple Choice

How many elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Multiple Choice

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

• yes

• no

Multiple Choice

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

• yes

• no

Multiple Choice

Is the following reaction balanced?
NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

• yes

• no

Multiple Choice

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic

Multiple Choice

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. The reaction is ...

• Endothermic

• Decomposition

• Exothermic

• Indothermic

Multiple Choice

What type of chemical reaction absorbs energy and requires energy for the reaction to occur?

• Endothermic

• Exotermic

• Exothermic

• Endotermic

Multiple Choice

Name the chemical that is needed for all combustion reactions.

• carbon dioxide

• petrol

• oxygen

• methane

Multiple Choice

Which type of radioactive decay has the highest penetrating ability?

• alpha

• beta

• gamma

• it is the same for all of them

Multiple Choice

Has the lowest penetrating power and can be stopped by a piece of paper or clothing.

• Alpha

• Beta

• Gamma

Multiple Choice

What percentage of rubidium-87 atoms will be left after three half lives?

• 25.0%

• 12.5%

• 6.25%

• 3.125%

Multiple Choice

What is Half-life?

• The amount of time it takes for some of the nuclei in a sample of the isotope to decay

• The amount of time it takes for half the electrons in a sample of the isotope to decay

• The amount of time it takes for half the nuclei in a sample of the isotope to decay

• the amount of time it takes to double the nuclei in a sample of the isotope to decay