Question 1

Approximately what percentage of the total solar radiation that falls upon the earth is immediately reflected back into space?

Accepted Answer

A) 15% 
B) 30% 
C) 45% 
D) 70% 
A) 15% 
B) 30% 
C) 45% 
D) 70%

Question 2

A fuel cell is an electrochemical device that

Accepted Answer

A) produces fuels from water. 
B) burns gasoline to produce heat. 
C) converts coal to a gas. 
D) converts chemical energy directly to electrical energy. 
A) produces fuels from water. 
B) burns gasoline to produce heat. 
C) converts coal to a gas. 
D) converts chemical energy directly to electrical energy.

Question 3

A substance that burns readily and releases significant amounts of energy is a(n)

Accepted Answer

A) reducing agent. 
B) fuel. 
C) endotherm. 
D) catalyst. 
A) reducing agent. 
B) fuel. 
C) endotherm. 
D) catalyst.

Question 4

Which of the following products is NOT made from petroleum?

Accepted Answer

A) plastics 
B) detergents 
C) perfumes 
D) tires 
A) plastics 
B) detergents 
C) perfumes 
D) tires

Question 5

A watt is

Accepted Answer

A) 1 s/joule. 
B) 1 cal/s. 
C) 1 joule/s. 
D) 1 s/cal. 
A) 1 s/joule. 
B) 1 cal/s. 
C) 1 joule/s. 
D) 1 s/cal.

Question 6

A major inconvenience of coal as a fuel is that it is a(n)

Accepted Answer

A) solid. 
B) liquid. 
C) gas. 
D) mixture of all three states. 
A) solid. 
B) liquid. 
C) gas. 
D) mixture of all three states.

Question 7

Discuss the problems of increasing the role of nuclear energy as an energy source.

Accepted Answer

Increasing the role of nuclear energy as

Question 8

Gasoline is a

Accepted Answer

A) compound. 
B) pure substance. 
C) simple mixture of C₅ - C₁₂ hydrocarbons. 
D) complex mixture of C₅ - C₁₂ hydrocarbons. 
A) compound. 
B) pure substance. 
C) simple mixture of C₅ - C₁₂ hydrocarbons. 
D) complex mixture of C₅ - C₁₂ hydrocarbons.

Question 9

How many joules of energy will a stock tank heater rated at 400 watts use in a 48 hour period?

Accepted Answer

A) 400 
B) 400 × 48 × 60 
C) 400 × 3600 
D) 400 × 48 × 3600 
A) 400 
B) 400 × 48 × 60 
C) 400 × 3600 
D) 400 × 48 × 3600

Question 10

Natural gas burns with a relatively clean flame.Which of the following potential pollutants is produced in significant quantities during the combustion of natural gas in air?

Accepted Answer

A) sulfur oxides 
B) nitrogen oxides 
C) metal oxides 
D) All of the above are produced in significant quantities. 
A) sulfur oxides 
B) nitrogen oxides 
C) metal oxides 
D) All of the above are produced in significant quantities.

Question 11

Which physical state has the greatest entropy?

Accepted Answer

A) solid 
B) liquid 
C) gas 
D) All have the same entropy. 
A) solid 
B) liquid 
C) gas 
D) All have the same entropy.

Question 12

A gasoline with an octane rating of 90 would give the same performance in a standard test engine as a mixture of

Accepted Answer

A) 90% isooctane and 10% heptane. 
B) 90% heptane and 10% isooctane. 
C) 90 parts isooctane and 90 parts heptane. 
D) 90 parts isooctane and 90 parts water. 
A) 90% isooctane and 10% heptane. 
B) 90% heptane and 10% isooctane. 
C) 90 parts isooctane and 90 parts heptane. 
D) 90 parts isooctane and 90 parts water.

Question 13

Which of the following statements about using ocean energy to generate electricity is NOT true?

Accepted Answer

A) Water will drive a turbine to generate electricity when it flows out of a reservoir at low tide. 
B) Water will drive a turbine to generate electricity when it flows out of a reservoir at high tide. 
C) The difference in temperature between surface water and the ocean depths can be used to evaporate a liquid to a vapor that drives a turbine. 
D) All of the above statements are true. 
A) Water will drive a turbine to generate electricity when it flows out of a reservoir at low tide. 
B) Water will drive a turbine to generate electricity when it flows out of a reservoir at high tide. 
C) The difference in temperature between surface water and the ocean depths can be used to evaporate a liquid to a vapor that drives a turbine. 
D) All of the above statements are true.

Question 14

The primary element in coal is

Accepted Answer

A) carbon. 
B) silicon. 
C) oxygen. 
D) chlorine. 
A) carbon. 
B) silicon. 
C) oxygen. 
D) chlorine.

Question 15

Which technology is NOT used at all today for the production of electricity?

Accepted Answer

A) nuclear fusion 
B) nuclear fission 
C) solar cells 
D) geothermal power plants 
A) nuclear fusion 
B) nuclear fission 
C) solar cells 
D) geothermal power plants

Question 16

Pure heptane would have an octane rating of

Accepted Answer

A) 0) 
B) 50. 
C) 75. 
D) 100. 
A) 0) 
B) 50. 
C) 75. 
D) 100.

Question 17

Which of the following is a fuel?

Accepted Answer

A) HCl 
B) H₂O 
C) C 
D) CO₂ 
A) HCl 
B) H₂O 
C) C 
D) CO₂

Question 18

A student mixes compound A with compound B and notices that a chemical reaction occurs.The temperature of the mixture decreases.The reaction is ________.

Accepted Answer

The answer of A student mixes compound A with compound...

Question 19

When natural gas is burned in insufficient air,________ can be (a)major product(s).

Accepted Answer

A) water 
B) carbon and soot 
C) methane 
D) octane 
A) water 
B) carbon and soot 
C) methane 
D) octane

Question 20

If very pure silicon is doped with a small amount of boron,the resulting crystal is called a(n)

Accepted Answer

A) solar cell. 
B) n-type semiconductor 
C) p-type semiconductor 
D) battery. 
A) solar cell. 
B) n-type semiconductor 
C) p-type semiconductor 
D) battery.

Exam 15: Energy

Approximately what percentage of the total solar radiation that falls upon the earth is immediately reflected back into space?

A fuel cell is an electrochemical device that

A substance that burns readily and releases significant amounts of energy is a(n)

Which of the following products is NOT made from petroleum?

A watt is

A major inconvenience of coal as a fuel is that it is a(n)

Discuss the problems of increasing the role of nuclear energy as an energy source.

Gasoline is a

How many joules of energy will a stock tank heater rated at 400 watts use in a 48 hour period?

Natural gas burns with a relatively clean flame.Which of the following potential pollutants is produced in significant quantities during the combustion of natural gas in air?

Which physical state has the greatest entropy?

A gasoline with an octane rating of 90 would give the same performance in a standard test engine as a mixture of

Which of the following statements about using ocean energy to generate electricity is NOT true?

The primary element in coal is

Which technology is NOT used at all today for the production of electricity?

Pure heptane would have an octane rating of

Which of the following is a fuel?

A student mixes compound A with compound B and notices that a chemical reaction occurs.The temperature of the mixture decreases.The reaction is ________.

When natural gas is burned in insufficient air,________ can be (a)major product(s).

If very pure silicon is doped with a small amount of boron,the resulting crystal is called a(n)

Chemistry

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