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WorksheetsSulphur
Total questions: 30
Worksheet time: 20mins
In the contact process, what are the raw materials needed for the production of sulfuric acid?
Water, air, sulfur
Ammonia, water, oxygen
Crude oil, air
Which one of the three stages of the contact process is reversible?
The burning of sulfur in oxygen to form sulfur dioxide
The reaction of sulfur dioxide with oxygen to form sulfur trioxide
The reaction of sulfur trioxide with water to form sulfuric acid
What is the name of the catalyst used in the contact process?
Iron
Nickel
Vanadium(V) oxide
The sulfur trioxide needs to be absorbed in concentrated sulfuric acid, rather than added direct into water. Why?
The addition to water will slow down the reaction
The addition to water will be highly exothermic
The addition to water will speed up the reaction
Which of the following is the correct symbol equation for the production of sulfur trioxide in the second stage of the contact process?
2SO2(g) + O2(g) ⇌ 2SO3(g)
2SO2(g) + O2(g) → 2SO3(g)
2S(s) + 3O2(g) → 2SO3(g)
Sulfuric acid acts as a dehydrating agent. What does this mean?
It removes oxygen from a substance
It removes water from a substance
It removes carbon dioxide from a substance
When concentrated sulfuric acid is added to glucose, a black solid is formed over time. What is the name of the black solid?
Copper(II) oxide
Coal
Carbon
What is the exact temperature used for contact process
4300C
4500C
5000C
3000C
Sulfur is a common starting material for the Contact process.Name a source of sulfur.
fossil fuels
geysers
volcanoes
artificial creation
one of the metal ores that are the source of sulphur...
Copper pyrites (CuFeS2)
Bauxite (Al2O32H2O)
Chile saltpeter (NaNO3)
Cryolite (Na3AlF6)
Uses of sulfuric acid (select 2)
In petroleum refining to wash impurities out of gasoline and other refinery products
used in mass production of automotive products
production of cast iron
Production of fertilisers
Which are the properties of Sulfuric acid (select 2)
dark in colour
good electrolyte
weak electricity conductor
corrosive
Acid rain is formed when sulfur dioxide and oxides of nitrogen dissolve in rain water. Which problem is not caused by acid rain?
breathing difficulties
dying trees
erosion of statues
lowered pH of lakes
Statement 1: The burning of fossil fuels containing sulfur is a cause of ‘acid rain’.
Statement 2: Acid rain contains sulfur dioxide which is formed when sulfur compounds burn in the air.
Which of the following is true?
Statement 1 is correct but statement 2 is incorrect.
Both statements are correct, but statement 2 does not explain statement 1.
Both statements are correct and statement 2 explains statement 1.
Statement 2 is correct but statement 1 is incorrect.
The uses of sulfur dioxide... (select 2)
rust prevention agent
A bleach in the manufacture of wood pulp for paper
A food preservative (by killing bacteria)
Used in mass production of plastic
What is the main use of sulfur?
Vulcanising rubber
Consuming
Manufacture sulfuric acid
Sterilising agent
When is Sulfur dioxide formed?
When it is boiled
When you consume it
When it is frozen
When it burns in Air
What is oleum?
A part of petroleum
An oil based compound
A precursor of sulphuric acid
Dilute sulphuric acid
Add dilute sulphuric acid slowly to a small amount of copper oxide in a watch glass with stirring. What do you observe in the above reaction?
Copper oxide present in the watch glass dissolves in dilute H2SO4 and the colour of the solution becomes blue.
Copper oxide present in the watch glass insoluble in dilute H2SO4 and the colour becomes black.
Copper oxide present in the watch glass dissolves in dilute H2SO4 and the colour of the solution becomes crimson red.
Copper oxide present in the watch glass dissolves in dilute H2SO4 and the colour of the solution becomes yellow.
Which of the following are CHEMICAL properties of acids?
Reacts with metals to form salt and hydrogen gas
Reacts with metal carbonates to form salt, water and carbon dioxide gas.
Reacts with bases to form salt and water only
Tastes sour
Properties of acid
pH less than 7
Corrosive
Tastes bitter
Turns blue litmus paper to red
Acid reacts with metal to produce ___________ gas.
oxygen
hydrogen
carbon dioxide
nitrogen
What are the uses of sulfuric acid? Choose the correct answers.
In the manufacture of detergents and fertilisers
As a battery acid
As food preservative
As a bleach
What are the conditions used in the Contact process?
1 atm and 450 °C
200 atm and 450 °C
450 atm and 1 °C
450 atm and 200 °C
What is H2S2O7?
Concentrated sulfuric acid
Sulfur trioxide
Oleum
Hydrogen sulfate
Why is sulfur trioxide not dissolved directly in water?
There would be no reaction
Sulfur trioxide is insoluble in water
Sulfur trioxide reacts violently with water to produce fog of H2SO4
Sulfur trioxide needs to be dry
sulfur (II) oxide
Sulfuric acid is a
weak acid
strong acid
What are the products formed when H2SO4 reacts with sugar(sucrose) ?
(a)
