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Worksheets6.3 Reversible Reactions & Equilibrium
Total questions: 27
Worksheet time: 20mins
What type of reactions can able to change products back to the their original form?
(a)
Irreversible reactions
Combustion reactions
Combination reactions
Which of the following changes is irreversible change?
(a)
Melting of ice cube
Heating hydrated CuSO4
Thermal decomposing NH4Cl
If a reversible reaction is exothermic in the forward direction, it will be ...
exothermic in the reverse direction
endothermic in the forward direction too
endothermic in the reverse direction
not involve energy in reverse direction
Heating aqueous Copper sulfate gives
(a)
Black powder
Orange juice
Blue powder
What is a closed system
It gives out energy
The reactants and the products do not escape from reaction mixture
It takes in energy
The reactants and the products escape from he reaction mixture to be kept in the system
At what time does the reaction reach equilibrium?
During equilibrium, the amount of the products and the amount of the reactants are (a) .
During equilibrium, the rates of the forward and the reverse reaction are (a)
The Haber process is the industrial process for making...
Ammonia
Sulfuric Acid
Margarine
Salts
What are the raw materials for the Haber process?
Hydrogen and Oxygen
Hydrogen and Nitrogen
Water and Nitrogen
Oxygen and Nitrogen
What are the optimum conditions for the Haber process?
450 atm and 200°C
200 atm and 450°C
How is nitrogen obtained for use in the Haber process?
By the simple distillation of liquid air
By the filtration of liquid air
By the titration of liquid air
By the fractional distillation of liquid air
The Haber process involves an exothermic reaction. What is the effect on the yield when the temperature is increased?
More ammonia is produced
Less ammonia is produced
No change in ammonia produced
What would happen if the temperature of a Haber process is reduced to below 450°C ? (Choose 2)
Less ammonia would be produced
The reaction would be faster
The reaction would be slower
More ammonia would be produced
What is the effect of increasing the pressure of a Haber process?
Equilibrium shifts to the left, more ammonia is produced
Equilibrium shifts to the left, less ammonia is produced
Equilibrium shifts to the right, more ammonia is produced
Equilibrium shifts to the right, less ammonia is produced
a) cleaning agent
b) fertiliser
c) explosive production
d) soap production
The Contact process is used for the manufacture of...
(a)
Select all the raw materials for the Contact process.
Sulfur
Air
Hydrogen
Water
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
Name the catalyst used in the Contact process.
Finely-divided Iron
Vanadium (V) Oxide
Nickel
Chromium
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
What is H2S2O7?
(a)
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
The enthalpy change of a reaction in the Contact process reads as ΔH=−197 kJ/mol. What does this tell us about the reaction?
It is an exothermic reaction
It is an endothermic reaction
It loses 197 grams of reactant
It produces 197 grams of product
