Chem Senior Final

Multiple Choice

Which type of reaction is: AB → A + B?

• Synthesis reaction
• Single displacement reaction
• Double displacement reaction
• Decomposition reaction

Multiple Choice

Which is a quality that only gases display?

• Spread out to fill all available space

• Can be compressed

• Take the shape of their container

• All of these

Multiple Choice

Gas molecules have no mass

• Fales

• True

Multiple Choice

Gas has no definite volume

• Fales

• True

Multiple Select

How do gas molecules move?

• in a circular motion

• in straight line paths

• in an orderly fashion

• constantly and randomly

Multiple Choice

Which container will have lower pressure?

• First container

• second container

Multiple Choice

Boyle's PV law : When _______ is held constant, the pressure and volume of a gas are ________ proportional

• temperature, equally

• temperature, inversely

• mass, equally

• mass, inversely

Multiple Choice

Whose law states that as pressure goes up, volume goes down?

• Mazias

• Boyle

• Charles

• Aglow

Multiple Choice

You leave a soccer ball outside in the winter. Will the ball end up flatter than it was before?

• Only if it's REALLY cold

• No

• Only if it has a leak

• Yes

Multiple Choice

As temperature rises ___________.

• an atom's kinetic energy decreases

• an atom's kinetic energy increases

• an atom's kinetic energy stays the same

Multiple Choice

The more energy that particles have, the ___ they move.

• faster

• slower

Multiple Choice

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

• The pressure will increase

• The pressure will decrease

• The pressure will remain constant

• The pressure will equalize

Multiple Choice

Which of the following would increase the (gas) pressure of a system?

• Increase the Temperature

• Pump in more gas

• Decrease the volume

• All of these

Multiple Choice

Pressure is

• defined as the mass that an object exerts when at rest.

• not a measurable in gases.

• defined as the number of moles of substance divided by the mass of the substance.

• created by the force of the gas particles impacting the walls of the container.

Multiple Choice

If the temperature of a gas increase, the pressure...

• Decreases

• Increases

• Does not change

Multiple Choice

If a balloon is cooled what will happen to the volume?

• Volume will increase

• Volume will decrease

• Volume will not change

Multiple Choice

Which container will have lower pressure?

• left

• right

• they both have the same pressure

Multiple Choice

Which of the following is a sign of a chemical reaction?

• Melting of ice
• Dissolving sugar in water
• Breaking a glass
• Color change

Multiple Choice

In the equation: 2H₂ + O₂ → 2H₂O, which are the reactants?

• H₂O and O₂
• 2H₂ and 2H₂O
• O₂ and H₂O
• 2H₂ and O₂

Multiple Choice

What does the Law of Conservation of Mass state?

• Mass is only conserved in physical changes.
• Mass is lost during a chemical reaction.
• Mass can be created in a chemical reaction.
• Mass cannot be created or destroyed.

Multiple Choice

•Balance the following equation:
___Al + ___O₂ → ___Al₂O₃

• 2 Al + 1 O₂ → 1 Al₂O₃
• 3 Al + 2 O₂ → 1 Al₂O₃
• 1 Al + 4 O₂ → 2 Al₂O₃
• 4 Al + 3 O₂ → 2 Al₂O₃

Multiple Choice

Identify the type of reaction:

Na + Cl₂ → NaCl

• Decomposition reaction
• Single replacement reaction
• Synthesis reaction
• Double replacement reaction

Multiple Choice

This a balanced chemical equation.

• True

• Fale

Multiple Choice

What do catalysts do in a chemical reaction?

• Catalysts change the products of a chemical reaction.
• Catalysts speed up chemical reactions by lowering activation energy.
• Catalysts slow down chemical reactions by increasing activation energy.
• Catalysts are consumed in the reaction and do not regenerate.

Multiple Choice

How many sodium atoms on the reactant side?

• 4

• 6

Multiple Choice

•Identify the type of reaction:

•

•CaCO₃ → CaO + CO₂

• Double replacement reaction
• Single replacement reaction
• Decomposition reaction
• Synthesis reaction

Multiple Choice

•Identify the type of reaction

•CH₄ + O₂ → CO₂ + H₂O

• Single replacement reaction
• Decomposition reaction
• Synthesis reaction
• Combustion reaction

Multiple Choice

•Identify the type of reaction

•Pb(NO₃)₂ + KI → PbI₂ + KNO₃

• Double displacement reaction
• Decomposition reaction
• Synthesis reaction
• Single displacement reaction

Multiple Choice

For a process to be defined as a chemical reaction, _____ must be produced.

• more mass

• the same substance

• light

• a new substance

Multiple Choice

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

• The break down of food into energy

• Photosynthesis in plants

• Metal rusting

• All of the above

• None of the Above

Multiple Choice

•A chemical reaction releases 200 kJ of heat. What kind of reaction is it?

• neutral
• exothermic
• endothermic
• spontaneous

Multiple Choice

One example of a chemical reaction is when H20 (water) melts and changes state from ice to liquid.

• True

• False

Multiple Select

Color Change is a sign of chemical reaction

• True

• False

Multiple Choice

What are the coefficients that will balance the skeleton equation below?

__MgS + __O₂ → __MgO + __SO₂

• 3,2,2,3

• 2,3,2,2

• 2,3,2,3

• 3,2,2,1

Multiple Choice

What are the coefficients that will balance the skeleton equation below?

__Na + __F₂ → __NaF

• 1, 2, 1

• 2, 1, 2

• 1,1,1

• 2,2,2

Multiple Choice

How many Oxygen (O) atoms on the product side?

• 3

• 9