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GCSE Chemistry Quiz on Haber and Contact Process, created by lisawinkler10 on 14/05/2015.

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Haber and Contact Process

Question 1 of 22

1

The following questions are on the Haber process. What is the process used for?

Select one of the following:

  • The manufacture of Sulfuric Acid

  • The manufacture of Ammonia

  • The manufacture of Nitrogen

  • Cracking hydrocarbons

Explanation

Question 2 of 22

1

Tick what Ammonia is made of

Select one or more of the following:

  • Nitrogen

  • Hydrogen

  • Carbon

  • Oxygen

Explanation

Question 3 of 22

1

Which two could hydrogen be obtained from?

Select one or more of the following:

  • Natural gas

  • Cracking of hydrocarbons

  • Burning sulfur in air

  • Electrolysis of water

Explanation

Question 4 of 22

1

The nitrogen is obtained from air

Select one of the following:

  • True
  • False

Explanation

Question 5 of 22

1

The reaction for the Haber Process is: N2 + 3 H2 ⇌ 2 NH3 (ΔH = −92.4 kJ·mol−1)

Select one of the following:

  • True
  • False

Explanation

Question 6 of 22

1

The equilibrium position is shifted to the right hand side for a high yield by...

Select one of the following:

  • using a low temperature and a high pressure

  • using a high temperature and a high pressure

  • using a high temperature and a low pressure

  • using a low temperature and a low pressure

Explanation

Question 7 of 22

1

What is the pressure used?

Select one of the following:

  • 2 atmospheres

  • 4 atmospheres

  • 50 atmospheres

  • 200 atmospheres

Explanation

Question 8 of 22

1

What reasons make a high pressure very expensive?

Select one or more of the following:

  • A lot of energy needed to compress the gases

  • Thick-walled pipes and reaction containers are needed

  • Dangerous so requires pressure safety equipment

  • Releases fossil fuels

Explanation

Question 9 of 22

1

What temperature is used as a compromise between rate and yield?

Select one or more of the following:

  • 450℃

  • 200℃

  • 1000℃

  • 50℃

Explanation

Question 10 of 22

1

What is the most economical catalyst?

Select one or more of the following:

  • Iron

  • Sodium

  • Magnesium

  • Lead

Explanation

Question 11 of 22

1

Under the conditions, how much hydrogen and nitrogen is converted into ammonia?

Select one of the following:

  • 98%

  • 15%

  • 60%

  • 100%

Explanation

Question 12 of 22

1

What happens to the unreacted nitrogen and hydrogen?

Select one of the following:

  • Passed again into the reaction chamber

  • Disposed of

  • Sent for analysis

  • Released into the environment to promote global warming

Explanation

Question 13 of 22

1

What happens to the ammonia?

Select one of the following:

  • It leaves the reaction vessel and is cooled, liquefied and tapped off.

  • It stays in the reaction vessel and is cooled, liquefied and tapped off.

  • It leaves the reaction vessel and is cooled, solidified and removed.

  • It stays in the reaction vessel and is cooled, solidified and tapped off.

Explanation

Question 14 of 22

1

What is ammonia used for?

Select one or more of the following:

  • Manufacture of fertilisers

  • Manufacture of nitric acid

  • Manufacture of nylon

  • Manufacture of steel

Explanation

Question 15 of 22

1

The following questions are on the Contact process. What is it used for?

Select one of the following:

  • Manufacture of sulfuric acid

  • Manufacture of ammonia

  • Manufacture of fertilisers

  • Manufacture of Copper Oxide

Explanation

Question 16 of 22

1

Stage 1 of the contact process is making sulfur dioxide: S(s)+O2(g)→SO2(g). How is this done?

Select one of the following:

  • By burning sulfur in air

  • By reacting it with oxygen

  • By absorbing it in oxygen

  • By diluting it with oxygen

Explanation

Question 17 of 22

1

Stage 2 of the contact process is making sulfur trioxide: 2SO2(g)+O2(g)⇌2SO3(g) ΔH=−196kJ/mol. How is this done?

Select one of the following:

  • Sulfur dioxide is reacted with oxygen

  • Sulfur dioxide is burnt in air

  • Sulfur dioxide is absorbed into oxygen

  • Sulfur dioxide is diluted with oxygen

Explanation

Question 18 of 22

1

It is called the contact process because in stage 2, the two gases react together in contact with a solid catalyst, Vanadium(V) Oxide

Select one of the following:

  • True
  • False

Explanation

Question 19 of 22

1

The forward reaction is exothermic so the yield would be increased by using a low temperature but due to rate of reaction, it is carried out at 450℃

Select one of the following:

  • True
  • False

Explanation

Question 20 of 22

1

There are fewer molecules on the right so the yield would increase with pressure, but as the yield is already 98%, what is the pressure used?

Select one of the following:

  • 2 atmospheres

  • 200 atmospheres

  • 50 atmospheres

  • 1000 atmospheres

Explanation

Question 21 of 22

1

Stage 3 of the contact process is making oleum: H2SO4(l)+SO3(g)→H2S2O7(l). How is this done?

Select one of the following:

  • Sulfur trioxide is absorbed into concentrated sulfuric acid

  • Sulfur trioxide is burnt with concentrated sulfuric acid

  • Sulfur trioxide is dissolved into concentrated sulfuric acid

  • Sulfur trioxide is diluted with concentrated sulfuric acid

Explanation

Question 22 of 22

1

The next part of stage 3 makes a concentrated solution of sulfuric acid out of oleum: H2S2O7(l)+H2O(l)→2H2SO4(aq). How is this done?

Select one of the following:

  • Oleum is diluted with water

  • Oleum is is rinsed with water

  • Oleum is recycled into water

  • Oleum is neglected by his parents

Explanation

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