Chapter Test 5 - Chemical Bonds (30questions)
The following questions and clipart are being used for educational purposes.  The test will correlate with VA SOLs PS. 2f; P4c; PS. 5a,c; PS. 6a,b,c. *Reference for questions: Prentice Hall Science Explorer, 2004Reference Clipart question 1-Hydrogen Peroxide: Ref. For educational purpose only: https://www. Snopes. Com/medical/homecure/peroxide. Asp Reference: Clipart, question 3, H2O: Free Gifs and Animation, https://www. Fg-a. Com Reference: Cartoons, questions3, 4      https://www. Usoe. K12. Ut. Us/curr/science/sciber00/8th/matter/sciber/chem type. Htm                                                      Â
- 1.
What type of reaction occurs when a bottle of hydrogen peroxide eventually turns into a bottle of water and oxygen? It breaks down! * H2O2 is the formula for hydrogen peroxide. (Remember the 2's should be smaller, a subscript, which drops below the symbols).- A.
Precipitate reaction
- B.
Synthesis reaction
- C.
Decomposition reaction
- D.
Replacement reaction
- 2.
What type of chemical reaction is between copper oxide and carbon that produces copper and carbon dioxide: (CuO + C yields Cu + CO2)*Look carefully at the location of oxygen (0) on both sides of the chemical equation. Study the cartoon below to get a clearer concept of what takes place in this chemical reaction: Notice, the guy in the orange shirt steals the date of the other guy. So, a part of one of the reactants trades places and is in a different place among the products. The girl is now dancing with the guy in the orange shirt, being swung up in the air.
- A.
Replacement
- B.
Synthesis
- C.
Decompostion
- D.
Precipitation
- 3.
What is the process, for example A + B = AB, called when two or more substances combine to make a more complex compound? In the cartoon, the skinny bird (reactant) and H2 + O = H2Othe worm (reactant) combine to make one product, a fat bird. (Water is also called dihydration monoxide)
- A.
Decomposition reaction
- B.
Replacement reaction
- C.
Precipitate reaction
- D.
Synthesis reaction
- 4.What are the chemicals that act as biological catalysts by speeding up reactions in living things?
- A.
Reactants
- B.
Fuels
- C.
Inhibitor
- D.
Enzymes
- 5.
Which of these is NOT one of the three things necessary to start and maintain a fire?
- A.
Carbon dioxide
- B.
Oxygen
- C.
Fuel
- D.
Heat
- 6.
What is the minimum amount of energy that has to be added to start a reaction?
- A.
Exothermic energy
- B.
Number of particles
- C.
Activation energy
- D.
Energy
- 7.All of the folowing answers are evidence of a chemical change, but what is sure evidence of a chemical reaction?
- A.
A color change as in leaves
- B.
The production of a new material as ash from a burnt log
- C.
Changes in properties
- D.
The formation of a gas
- 8.
A reaction that absorbs energy in the form of heat is described as
- A.
Exothermic reaction
- B.
Endothermic reaction
- C.
Combustion
- D.
Unbalanced
- 9.In a chemical reaction
- A.
There is "no change" in energy
- B.
Energy is "always absorbed"
- C.
Energy is "always released"
- D.
Energy is "either absorbed or released"
- 10.
Which process changes matter into one or more new substances?
- A.
Physical change
- B.
Chemical change
- C.
Conservation
- D.
Freezing
- 11.
Water vapor in the air turns to liquid water in the form of rain. This is an example of a
- A.
Chemical formula
- B.
Chemical equation
- C.
Chemical change
- D.
Physical change
- 12.Every chemical reaction involves a change in
- A.
Mass
- B.
Energy
- C.
Concentration
- D.
State
- 13.What happens when chemical bonds break and new bonds form?
- A.
A physical change
- B.
A chemical change
- C.
Matter is destroyed
- D.
Surface area increases
- 14.A solid that forms from solution during a chemical reaction is called a
- A.
Bond
- B.
Reactant
- C.
Chemical
- D.
Precipitate
- 15.A shorter, easier way to show chemical reactions using symbols instead words, is called a
- A.
Chemical formula
- B.
Chemical equation
- C.
Symbol
- D.
Subscript
- 16.Symbols of elements are used to write the formula of compounds much like
- A.
Numbers used to write coefficients
- B.
Products are used to make reactants
- C.
Letters are used to write words
- D.
Numbers are used to balance equations
- 17.What type of energy releases heat?
- A.
Endothermic reaction
- B.
Molecular reaction
- C.
High heat
- D.
Exothermic reaction
- 18.In chemical reactions, what does the principle of conservation of mass mean?
- A.
Matter is not changed
- B.
The total mass of reactants is greater than the total mass of the products
- C.
The total mass of the reactants is greater than the total mass of products
- D.
Matter is not created or destroyed
- 19.What is a material used to decrease the rate of a chemical reaction?
- A.
Inhibitor
- B.
Catalyzt
- C.
Enzyme
- D.
Fuel
- 20.What is the best way to put out a small kitchen fire?
- A.
Blow it out
- B.
Use a garden hose
- C.
Turn off appliances
- D.
Use a home fire extinguisher
- 21.In what way can a fire be brought under control?
- A.
Add fuel
- B.
Add oxygen
- C.
Remove oxygen
- D.
Remove carbon dioxide
- 22.
What is a rapid reaction between oxygen and a fuel is known as
- A.
Heat
- B.
Combustion
- C.
Activation
- D.
Decomposition
- 23.How does water most affect fires?
- A.
Increasing the temperature
- B.
Producing carbon dioxide and removing fuel
- C.
Decreasing activation energy
- D.
Cooling the fire and preventing contact between oxygen and fuel
- 24.To balance the chemical equation in which hydrogen and oxygen are combined to yield water (H2 + O2 yields H2O), one would need to
- A.
Change the coefficient of H2 to 2
- B.
Change only the coefficient of O2 to 2
- C.
Change the coefficient of both H2 and H2O to 2
- D.
Change the coefficient of both O2 and H2O to 2
- 25.Which of the following does not increase the number of particles of a substance available to react in a chemical reaction? Remember:We read about three different ways to increase the number of particles available to react in a chemical reaction in this chapter.
- A.
Increasing the concentration
- B.
Increasing the surface area
- C.
Adding a catalyst which increases the rate of reaction, but lowers the activation energy
- D.
Increasing the mass
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