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Hydrogen as fuel cell

Total questions: 100

Worksheet time: 7hrs 19mins

Name
Class
Date
1.
Fuels used for energy production, including those used in fuel cells, are substances that can, under the right conditions
a)
undergo reduction in a spontaneous endothermic reaction
b)
undergo reduction in a spontaneous exothermic reaction
c)
undergo oxidation in a spontaneous endothermic reaction
d)
undergo oxidation in a spontaneous exothermic reaction
2.

Why can some cells not be recharged?

a)

Because the reaction is not reversible

b)

Because the reaction is reversible

c)

Because the reactant is used up

d)

Because the products are used up

3.

Complete the equation which occurs at the positive electrode of a hydrogen fuel cell O₂ + 2H₂O →

a)

OH⁻

b)

2OH⁻

c)

3OH⁻

d)

4OH⁻

4.

Complete the equation which occurs at the negative electrode of a hydrogen fuel cell 2H₂ + 4OH⁻ →

a)

H₂O + 4e⁻

b)

4H₂O + e⁻

c)

4H₂O + 4e⁻

d)

3H₂O + 2e⁻

5.

State three disadvantages of hydrogen fuel cells

a)

Do not need to be recharged, no pollutants are produced, can be different sizes for different uses

b)

Hydrogen is highly flammable, hydrogen is sometimes produced through non-renewable means, hydrogen is difficult to store

6.

State three advantages of hydrogen fuel cells

a)

Do not need to be recharged, no pollutants are produced, can be different sizes for different uses

b)

Hydrogen is highly flammable, hydrogen is sometimes produced through non-renewable means, hydrogen is difficult to store

7.

What are the products in a hydrogen fuel cell?

a)

Water

b)

Oxygen

c)

Hydrogen

8.

What is a fuel cell?

a)

A cell which uses hydrogen to generate electricity.

b)

A cell which uses oxygen (or air) to generate electricity.

c)

A cell which uses a fuel to generate electricity.

d)

A cell which uses a fuel and oxygen (or air) to generate electricity.

9.

How does the reactivity of the metal electrodes affect the size of the potential difference?

a)

The lower the difference in reactivity, the greater the potential difference.

b)

The greater the difference in reactivity, the lower the potential difference.

c)

The greater the difference in reactivity, the greater the potential difference.

d)

The lower the difference in reactivity, the lower the potential difference.

10.

In non-rechargeable cells, why do the chemical reactions stop over time?

a)

One of the reactants becomes used up.

b)

The energy has depleted.

c)

The products are oxidised.

d)

The electrodes become reactive.

11.

What is a battery?

a)

A single cell

b)

Two or more cells connected in series

c)

AA or AAA

d)

An alkaline substance

12.

What does the potential difference of a cell depend on?

a)

The anode and cathode.

b)

The type of electrolyte and fuel

c)

Whether it's alkali or not

d)

The type of electrode and the electrolyte.

13.

What is an electrolyte?

a)

An electric current

b)

The splitting of ionic compounds

c)

A solution containing ions which allows current to flow.

d)

The salts in drinking water.

14.

What are the main components of a chemical cell?

a)

An anode, a cathode

b)

An anode, a cathode and an electrolyte

c)

An anode and an electrolyte

d)

A cathode and an electrolyte

15.
What is the fuel for a fuel cell?
a)
Oxygen
b)
Hydrogen-rich Fuels
c)
Ozone
d)
Water
16.
Fuel cells produce
a)
Fossil Fuels
b)
Hydrogen gas
c)
Electricity
d)
Gasoline
17.

In a hydrogen fuel cell used to power a car, where does the oxygen come from?

a)

The air

b)

A catalyst

c)

The fuel

18.

What is a strength of using hydrogen-oxygen fuel cells in manned spacecraft, compared to using chemical cells?

a)

They produce electricity

b)

They produce water that the astronauts can drink

c)

They produce a voltage

19.

What is the main reason why hydrogen is more difficult to store than diesel?

a)

Hydrogen is a gas at room temperature but diesel is a liquid

b)

Hydrogen can be liquefied by cooling it

c)

Hydrogen can be stored under pressure

20.

Which of these is a disadvantage of cars driven by hydrogen-oxygen fuel cells rather than by petrol engines?

a)

They have fewer moving parts

b)

There are fewer suitable filling stations

c)

They emit little pollution

21.

What happens to oxygen molecules in a hydrogen-oxygen fuel cell?

a)

They react with electrons to form oxide ions, O2-

b)

They react with hydrogen ions to form hydroxide ions, OH-

c)

They react with hydrogen ions and electrons to form water

22.

What happens to hydrogen molecules in a hydrogen-oxygen fuel cell?

a)

They form hydrogen ions, H+ , and electrons, e-

b)

They form hydrogen ions, H+ , and electrons, e+

c)

They form hydrogen atoms, H

23.

What is produced by a hydrogen-oxygen fuel cell?

a)

Water and Carbon Dioxide

b)

Carbon Dioxide

c)

Water

24.

What type of reaction takes place in a chemical cell

a)

Exothermic

b)

Endothermic

c)

No reaction occurs

25.

What is produced by a hydrogen-oxygen fuel cell?

a)

Water and Carbon Dioxide

b)

Carbon Dioxide

c)

Water

26.

What energy conversion occurs in a combustion engine?

a)

Chemical energy → Electrical Energy

b)

Chemical energy → Thermal energy → Kinetic energy → Electrical Energy

27.

What energy conversion occurs in fuel cells.

a)

Chemical energy → Electrical Energy

b)

Chemical energy → Thermal energy → Kinetic energy → Electrical Energy

28.

What type of reaction occurs in a fuel cell?

a)

Exothermic

b)

Endothermic

29.

In the image is an acidic hydrogen fuel cell. The half reaction occurring at the identified electrode is...

a)

O2 (g) + 4H+ (aq) + 4e- → 2H2O (l)

b)

O2 (g) + 2H2O (l) + 4e- → 4OH- (aq)

c)

H2 (g) → 2H+ (aq) + 2e-

d)

H2 (g) + 2OH- (aq) → 2H2O (l) + 2e-

30.

In the image is an acidic hydrogen fuel cell. The electrode the arrow is pointing to is the...

a)

Positive electrode

b)

Negative electrode

31.

oxygen is a strong...

a)

oxidising agent

b)

reducing agent

32.

Acidic fuel cells have...

a)

H+ electrolyte

b)

OH- electrolyte

33.

In the image is an acidic hydrogen fuel cell. The half reaction occurring at the identified electrode is...

a)

O2 (g) + 4H+ (aq) + 4e- → 2H2O (l)

b)

O2 (g) + 2H2O (l) + 4e- → 4OH- (aq)

c)

H2 (g) → 2H+ (aq) + 2e-

d)

H2 (g) + 2OH- (aq) → 2H2O (l) + 2e-

34.

In the image is an acidic hydrogen fuel cell. Which electrode is the arrow pointing to?

a)

Negative electrode

b)

Positive electrode

35.
Which one of the following state is true for both fuel cells and rechargeable cells?
a)
All reactants are stored within the cell.
b)
Reaction products are continuously removed from the cell.
c)
Electrons pass from the reductant to the anode as electricity is produced.
d)
Electrical energy is converted to chemical energy as the cell is recharged.
36.
A fuel cell can be constructed that uses the two half-reactions as shown.
Which one of the following statements about this fuel cell is most likely to be correct?
a)
An external power supply is used to recharge the cell.
b)
Gaseous products are recycled into the cell to improve efficiency.
c)
Chemical energy is not completely converted into electrical energy.
d)
More H+ ions are produced at the anode than are consumed at the cathode.
37.
A fuel cell can be constructed that uses the two half-reactions as shown.
Which one of the following would occur at the negative electrode of the cell as it generates electricity?
a)
production of H+
b)
formation of H2O
c)
consumption of CO2
d)
reduction of CH3OH
38.
A fuel cell currently under development for powering small electronic devices is based on the reaction of methanol and oxygen using an acidic electrolyte. The reductant in the cell reaction and the half-reaction at the anode are
a)
Methanol; O2(g) + 4H+(aq) + 4e- → 2H2O(l)
b)
Oxygen; O2(g) + 4H+(aq) + 4e- → 2H2O(l)
c)
Methanol; CH3OH(g) + H2O(l) → CO2(g) + 6H+(aq) + 6e-
d)
Oxygen; CH3OH(g) + H2O(l) → CO2(g) + 6H+(aq) + 6e-
39.
In a fuel cell based on the oxidation of methane, the equation for the anode half-reaction is:
CH4(g) + 2H2O(l) → CO2(g) + 8H+(aq) + 8e-
The corresponding equation for the half-reaction at the cathode is
a)
2H2O(l) + 4e- → 4H+(aq) + O2(g)
b)
4H+(aq) + O2(g) → 2H2O(l)
c)
2H2O(l) → 4H+(aq) + O2 (g) + 4e-
d)
4H+(aq) + O2(g) + 4e- → 2H2O(l)
40.
The energy released in a chemical reaction is directly converted to electrical energy in al
a)
solar cell
b)
electrolytic cell
c)
fossil-fuel power station
d)
hydrogen/oxygen fuel cell
41.
Methane gas is used as a fuel in an acidic fuel cell. The half-equation occurring at the anode will be
a)
O2(g) + 4H+(aq) + 4e- →2H2O(g)
b)
CH4(g) + 2H2O(g) → CO2(g) + 8H+ (aq) + 8e-
c)
CH4(g) + 4H+(g)→ CO2(g) + 4H2O(l)
d)
CO2(g) + 8H+(aq) + 8e- → CH4(g) + 2H2O(g)
42.
A simplified diagram of the phosphoric acid fuel cell (PAFC), and their half-reactions are shown. The cell operates at 190oC using an electrolyte of liquid phosphoric acid.
Consider the following statements in regards to the PAFC:
I. The electrodes are likely to be porous and have a catalytic function.
II. More electrical energy will be produced in the PAFC for an equivalent mass of hydrogen, than using the fuel to produce steam for the generation of electricity by a turbine and generator.
III. The water generated in the cell reaction will dilute the electrolyte progressively and lower the efficiency of the cell.
Which of the above statements about PAFC are correct?
a)
I and II only
b)
I and III only
c)
II and III only
d)
I, II and III
43.
A simplified diagram of the phosphoric acid fuel cell (PAFC), and their half-reactions are shown. The cell operates at 190oC using an electrolyte of liquid phosphoric acid.
During operation of the PAFC, electrode I is
a)
positively charged, and the pH near the electrode will increase
b)
positively charged, and the pH near the electrode will decrease
c)
negatively charged, and the pH near the electrode will increase
d)
negatively charged, and the pH near the electrode will decrease
44.
The half-equation for the reaction occurring at the (+) electrode in a hydrogen-oxygen fuel which has an alkaline electrolyte would be
a)
H2(g) + 2OH-(aq)→ 2H2O(l) + 2e-
b)
H2(g) → 2H+(g) + 2e-
c)
O2(g) + 4H+(aq) + 4e- → 2H2O(l)
d)
O2(g) + 2H2O(l) + 4e- → 4OH- (aq)
45.

The overall reaction for an alkaline fuel cell is...?

a)

4OH-(aq) + H2(g) => 4H2O(l)

b)

2H2O(l) + O2(g) => 2H2O2(l)

c)

O2(g) + 2H2(g) => 2H2O(l)

d)

2H2O2(l) => O2(g) + 2H2O(l)

46.

Identify as many factors as possible related to using hydrogen fuel cells

a)

Only produces water

b)

A fuel cell does not need to be recharged

c)

Hydrogen is made from non-renewable fossil fuels

d)

Hydrogen is explosive

e)

Hydrogen is difficult to store as it is a gas

47.

What 2 reasons might the government use to produce more hydrogen filling stations?

a)

using hydrogen only produces water

b)

using hydrogen saves crude oil

c)

hydrogen is renewable

d)

producing fuel cells does not make any greenhouse gases

48.

What type of energy is produced by hydrogen fuel cells?

a)

Heat

b)

Electrical

c)

Light

d)

Chemical

49.

Give two factors that affect the voltage of a cell?

a)

type of electrode

b)

temperature

c)

gas produced

d)

current

50.

Why can a rechargeable battery be recharged?

a)

Reaction is reversible

b)

Reaction is irreversible

c)

External power supply attached

d)

Battery can be charged back up again

51.

Why do non-rechargeable cells stop producing electricity?

a)

They become flat

b)

One of the reactants runs out

c)

Reaction stops because none of the reactants runs out

d)

Reaction stops because one of the reactants runs out

52.

Hydrogen fuel cell train exists in this world.

a)

True

b)

False

53.

An electrochemical cell that produces electricity through the redox reaction of hydrogen and oxygen is called:

a)

fuel cell

b)

sickle cell

c)

prison cell

d)

plant cell

54.

The combustion of hydrogen produces _________ as by-product.

a)

water

b)

carbon dioxide

c)

carbon monoxide

d)

carbon

55.

Which country has the highest number of hydrogen refueling station?

a)

Japan

b)

Germany

c)

United States of America

d)

China

56.

Hydrogen produced industrially using fossil fuel such as natural gas without integrated CO2 capture is considered as ________________hydrogen.

a)

Grey

b)

Blue

c)

Green

d)

Red

57.

In the current technology, hydrogen can be extracted via electrolysis from _________.

a)

water

b)

methane

c)

diesel

d)

petrol

58.

The three common methods to produce hydrogen are:

a)

steam methane reforming

b)

gasification of coal

c)

electrolysis

d)

electroplating

59.

What is the advantage of using hydrogen as fuel in a fuel cell?

a)

Hydrogen is cheap and easily available

b)

It produces no harmful by-products

c)

Hydrogen provides the largest quantity of electricity per gram of fuel burnt

d)

It is light

60.

Battery for electric cars should have all of the properties listed below except

a)

it must be cheap

b)

it is able to supply high current density

c)

it must be big

d)

it must be able to store charge for long period of time

61.

Statement 1 : Hydrogen is used as a fuel

Statement 2 : When hydrogen burns in the air to form water, heat energy is produced


Which is correct?

a)

Both statements are correct and statement 2 explains statement 1

b)

Both statements are correct but statement 2 does not explain statement 1

c)

Statement 1 is correct but statement 2 is incorrect

d)

Statement 2 is correct but statement 1 is incorrect

62.

Which substance could not be used as a fuel to heat water in a boiler?

a)

ethanol

b)

hydrogen

c)

methane

d)

oxygen

63.

Which substance does not use oxygen to produce energy?

a)

coal

b)

hydrogen

c)

natural gas

d)

uranium

64.

Power stations produce electrical energy from different fuels.


Which fuel causes least pollution to the atmosphere?

a)

coal

b)

fuel oil

c)

natural gas

d)

radioactive isotopes

65.

Which fuel does not produce air pollution when it burns?

a)

coal

b)

diesel oil

c)

hydrogen

d)

gasoline (petrol)

66.

A power station was designed to burn gaseous fuels only.

Which two substances could be used?

a)

carbon dioxide and hydrogen

b)

carbon dioxide and uranium-235

c)

hydrogen and methane

d)

methane and uranium-235

67.

The diagram shows some properties that substances may have.

a)

A

b)

B

c)

C

d)

D

68.

Metals are welded by using heat produced by burning a gas in oxygen.


Which gas could not be used for this purpose?

a)

ethene

b)

hydrogen

c)

helium

d)

methane

69.

Which fuel does not produce

carbon dioxide when it burns?

a)

coal

b)

hydrogen

c)

methane

d)

petrol

70.

Which statement about a fuel cell in a car is correct?

a)

The fuel cell produces heat, which powers the car

b)

The fuel cell is supplied with hydrogen directly from the air

c)

The only emission from a fuel cell is nitrogen gas, which is non-polluting

d)

The fuel cell produces electricity, which powers an electric motor

71.

Why are fuel cell vehicles better than conventional.

a)

It has no tail pipe emissions.

b)

It uses hydrogen not fossil fuels for the fuel.

c)

All of the above.

d)

can go twice as far as a conventional vehicle on 1 gallon.

72.

How do fuel cells produce energy (look at the image)

a)

The hydrogen gives of oxygen to create energy then recombine to create water.

b)

Oxygen enters then gives of a electron then combines with hydrogen to create water.

c)

Hydrogen gives of an electron then recombined with the electron and oxygen to create water.

d)

All of the above

73.

Does hydrogen produce more co2 than electric vehicles

a)

True

b)

False

74.

what is the most effective fuel for a fuel cell.

a)

Natural gasses.

b)

Solar hydrogen.

c)

Pure hydrogen.

75.

are fuel cells completely clean and produce no emissions.

a)

Yes

b)

No

c)

Maybe but you can donate to hydrogen fuel research.

76.

Do hydrogen fuels use gasoline

a)

True

b)

False

77.

Why do hydrogen fuel cells produce water as a tail pipe emission

a)

It takes the left over water from your cup.

b)

The hydrogen used to power the car combines with a oxygen to make water

c)

The car is thirsty

78.

A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms is (a)  

79.

In which type of Fuel Cell Ammonia can be used instead of Hydrogen?

a)

Alkaline Fuel Cell (AFC)

b)

Phosphoric Acid Fuel Cell (PAFC)

c)

Polymer Electrolyte Membrane (PEM)

d)

Molten Carbonate Fuel Cell (MCFC)

80.

Combination of Hydrogen Gas produced by Electrolysis of Water using Electrical Energy from Renewable Energy Source and Vehicle driven by Hydrogen Fuel Cell, will have almost negligible generation of Greenhouse Gases. Is this statement true or false?

a)

True

b)

False

81.

Hydrogen used for Fuel Cells is produced

a)

By Reformer using Crude Oil/Coal/Natural Gas

b)

By Reformer using Wood/Organic Waste/Biomass

c)

By Electrolysis of Water using Electrical Energy from Renewable / Non-Renewable power Plants

d)

Any of the Above

82.

In which of the Fuel Cell the Electrolyte used is in liquid form

a)

Alkaline Fuel Cell (AFC)

b)

Polymer Electrolyte Membrane (PEM)

c)

Molten Carbonate Fuel Cell (MCFC)

d)

Solid Oxide Fuel Cell (SOFC)

83.

In Fuel Cell Powered Vehicles, hydrogen is generally stored

a)

As Gas in Pressurized Tanks

b)

As Metal Hydrate

c)

As Cryogenic Liquid

84.

Besides the work-done in external Electrical Circuit, the byproduct of Hydrogen Fuel Cell are

a)

Water

b)

Heat

c)

Both Water and Heat

85.

A single Hydrogen Fuel Cell produces

a)

Less than 0.5 Volts

b)

0.7 to 1.0 Volts

c)

1.5 Volts

d)

2.0 Volts

86.

Chemical Reaction happening at Cathode of Hydrogen Fuel Cell is an

a)

Endothermic Reaction

b)

Exothermic Reaction

c)

Iso-thermic Reaction

d)

None of the Above

87.

In Hydrogen Fuel Cell, electrical current flows in external circuit through

a)

Protons

b)

Holes

c)

Electrons

d)

All of the above

88.

Hydrogen Fuel Cell are

a)

Pollution Free

b)

More efficient than Combustion Power Plant

c)

More efficient than Gasoline based Internal Combustion Engine

d)

Have Noiseless / Silent Operation.

e)

All of the above.

89.

What is NOT product of complete combustion?

a)

carbon dioxide

b)

water

c)

carbon monoxide

d)

water

90.

This type of combustion occurs when there is a limited supply of oxygen

a)

Complete Combustion

b)

Incomplete Combustion

91.
Which of these is a disadvantage of hydrogen fuel cells
a)
produces pollution
b)
expensive and flammable
c)
heavy and weak
d)
large and unattractive
92.

Why are fuel cell vehicles better than conventional.

a)

It has no tail pipe emissions.

b)

It uses hydrogen not fossil fuels for the fuel.

c)

All of the above.

d)

can go twice as far as a conventional vehicle on 1 gallon.

93.

A hydrogen fuel cell is most similar to?

a)

an engine

b)

a photovoltaic cell

c)

a battery

d)

a source of coal

94.

Hydrogen fuel cells are dependent upon

a)

time of day

b)

fossil fuels

c)

neither

d)

both

95.

The following equation represents what goes on during a hydrogen cell ... 2H 2 + O 2 → 2H 2O

a)

True

b)

False

96.
Fuel cells produce
a)
Fossil Fuels
b)
Hydrogen gas
c)
Electricity
d)
Gasoline
97.

In a hydrogen fuel cell used to power a car, where does the oxygen come from?

a)

The air

b)

A catalyst

c)

The fuel

98.

What is the main reason why hydrogen is more difficult to store than diesel?

a)

Hydrogen is a gas at room temperature but diesel is a liquid

b)

Hydrogen can be liquefied by cooling it

c)

Hydrogen can be stored under pressure

99.

Which of these is a disadvantage of cars driven by hydrogen-oxygen fuel cells rather than by petrol engines?

a)

They have fewer moving parts

b)

There are fewer suitable filling stations

c)

They emit little pollution

100.

What is produced by a hydrogen-oxygen fuel cell?

a)

Water and Carbon Dioxide

b)

Carbon Dioxide

c)

Water