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WorksheetsYear 11 Chemistry Summer 1 Quiz 8- C8 Rates & Equilibrium Pt 2
Total questions: 30
Worksheet time: 15mins
C8.5- What is a catalyst?
A chemical that increases the rate of a reation
A chemical that alters the position of a chemical equilibrium
A chemical that increases the yield of a chemical reaction
A chemical which slows down a rate of reaction
C8.5- How does a catalyst work?
It produces more product
It offers an alternative route of lower activation energy
It increases the energy of the particles
It makes the particles bigger
C8.5- Which group on the Periodic Table acts best as a catalyst?
Group 1- The Alkali Metals
Group 7- The Halogens
Group 0- The Noble Gases
The Transition Metals
C8.5- If 10g of catalyst are added to a reaction, how much is left at the end of the reaction?
0g
5g
10g
20g
C8.5- What is the advantage of using a catalyst in industry?
It produces a product at a faster rate
It requires less energy
The catalyst does not need replacing regularly
All of the above
C8.5- What is a disadvantage of using catalysts?
They are often precious, expensive metals
They require replacing regularly
Large masses of catalyst are needed
All of the above
C8.6- What is the correct symbol for a reversible reaction?
C8.6- What does the word anhydrous mean?
With water
Without water
With hydrogen
Without hydrogen
C8.6- What colour is anhydrous copper (II) sulfate?
White
Black
Blue
Green
C8.6- What colour is hydrated copper (II) sulfate?
White
Black
Blue
Green
C8.6- How do you turn anhydrous copper (II) sulfate into hydrated copper (II) sulfate?
Heat the substance
Cool the substance
Add water
Remove water
C8.6- How do you turn hydrated copper (II) sulfate into anhydrous copper (II) sulfate?
Heat the substance
Cool the substance
Add water
Remove water
C8.6- What state are the simple molecular compounds ammonia (NH3) and hydrogen chloride (HCl)?
Solid
Liquid
Gas
Aqueous
C8.6- In what state is the giant ionic compound ammonium chloride (NH4Cl)?
Solid
Liquid
Gas
Aqueous
C8.7- If the forward reaction of a reversible reaction is exothermic, what can you tell of the backwards reaction?
Nothing
It is also exothermic
It is endothermic
It has no energy change
C8.7- If a forwards reaction has an energy change of -100kJ/mol, what is the energy change of the backwards reaction?
-100 kJ/mol
0 kJ/mol
50 kJ/mol
100kJ/mol
C8.7- What can be said of the reaction of hydrated copper (II) sulfate to anhydrous copper (II) sulfate?
It is exothermic
It is endothermic
It could be either exothermic or endothermic
It is neither exothermic nor endothermic
C8.8- What is a dynamic equilibrium?
A closed system
A reversible reaction in which the forwards and backwards reaction occur at the same rate
A reversible reaction in which the reactants and products do not change
All of the above
C8.8- What happens the the rate of the forwards reaction as a reversible reaction takes place?
It remains constant
It starts quickly and slows down to a constant rate
It starts quickly and reduces in a linear pattern to zero
It starts slowly and increases to a constant rate
C8.8- What happens the the rate of the backwards reaction as a reversible reaction takes place?
It remains constant
It starts quickly and slows down to a constant rate
It starts quickly and reduces in a linear pattern to zero
It starts slowly and increases to a constant rate
C8.9- How does a catalyst affect a reversible reaction?
It increases the rate of the forward reaction
It increases the rate of the backwards reaction
It increases the rate of both the fowards and backwards reaction
It has no effect
C8.9- How does a catalyst affect the position of an equilibrium?
It produces more reactant
It produces more product
It produces both more reactant and more product
It has no effect
C8.9- How does increasing the concentration of reactants affect a reversible reaction?
It favours the forward reaction
It favours the backwards reaction
It has no effect
It increases the rate of both the forwards and backwards reaction
C8.9- How does increasing the pressure affect the position of an equilibrium?
It favours the forwards reaction
It favours the backwards reactions
It favours the direction that produces a great number of gas molecules
It favours the direction that produces a fewer number of gas molecules
C8.9- Look at the following reaction-
N2 (g) + 3H2 (g) ⇌ 2NH3 (g)
Which side of the reaction has fewer molecules?
The reactants
The products
The left side
Neither
C8.9- Look at the following reaction-
N2 (g) + 3H2 (g) ⇌ 2NH3 (g)
How does reducing the pressure affect the position of the equilibrium?
It favours the forwards reaction
It favours the backwards reaction
It favours the right-hands side
It has no effect
C8.9- How does increasing the temperature affect the position of an equilbrium?
It favours the forwards reaction
It favours the backwards reaction
It favours the exothermic direction
It favours the endothermic direction
C8.9- How does decreasing the temperature affect the position of an equilbrium?
It favours the forwards reaction
It favours the backwards reaction
It favours the exothermic direction
It favours the endothermic direction
C8.9- Look at the following reaction-
N2 (g) + 3H2 (g) ⇌ 2NH3 (g)
How does increasing the temperature affect the rate of reaction?
It favours the forwards reaction
It favours the backwards reaction
There's not enough information in the question to answer this
It increases it
C8.9- The following reaction is exothermic in the forwards direction-
N2 (g) + 3H2 (g) ⇌ 2NH3 (g)
What conditions will maximise the yield of ammonia (NH3) produced?
High temperature, high pressure
High temperature, low pressure
Low temperature, high pressure
Low temperature, low pressure
