QUIZ on Reversible reactions & chemical equilibrium practise exam questions for higher level tier GCSE level AQA, Edexcel, OCR, WJEC, CIE and CCEA GCSE courses doc brown's chemistry

This means a chemical reaction is? [am-1]
1. reversible
2. exothermic
3. endothermic
4. decomposition
A reaction which gives out heat to the surroundings is described as? [am-2]
1. reversible
2. exothermic
3. endothermic
4. decomposition
A reaction which takes in heat from the surroundings is described as? [am-3]
1. reversible
2. exothermic
3. endothermic
4. decomposition
For a chemical reaction, the word 'reversible' means? [am-4]
1. heat is alternately given out and taken in as the reaction proceeds
2. reactants can only be converted to products
3. the products and reactants of a reaction are in a state of balance
4. products can be readily converted back to reactants
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-5]
1. from left to right is called the forward reaction
2. from right to left is called the equilibrium reaction
3. if left to right is exothermic, from right to left is also exothermic
4. if left to right is endothermic, from right to left is also endothermic
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-6]
1. from left to right is called the reversible reaction
2. from right to left is called the backward reaction
3. if left to right is exothermic, from right to left is also exothermic
4. if left to right is endothermic, from right to left is also endothermic
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-7]
1. from left to right is called the reversible reaction
2. from right to left is called the equilibrium reaction
3. if left to right is exothermic, from right to left is endothermic
4. if left to right is endothermic, from right to left is also endothermic
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-7]
1. from left to right is called the reversible reaction
2. from right to left is called the equilibrium reaction
3. if left to right is exothermic, from right to left is also exothermic
4. if left to right is endothermic, from right to left is exothermic
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-9]
1. the gases formed are colourless
2. the formation of the solid is endothermic
3. ammonium gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-10]
1. the gases formed are colourless and green
2. the formation of the solid is exothermic
3. ammonium gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-11]
1. the gases formed are colourless and green
2. the formation of the solid is endothermic
3. ammonia gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-12]
1. the gases formed are colourless and green
2. the formation of the solid is endothermic
3. ammonium gas is formed
4. hydrogen chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-13]
1. the gases are formed by an endothermic reaction
2. the formation of the solid is a decomposition reaction
3. ammonium gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-14]
1. the forward reaction (L to R) is exothermic
2. on heating, the hydrated solid changes colour from blue to white
3. the heating effect can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-15]
1. the forward reaction (L to R) is exothermic
2. on heating, the hydrated solid changes colour from white to blue
3. the reverse reaction can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-16]
1. the forward reaction (L to R) is exothermic
2. on heating, the hydrated solid changes colour from white to blue
3. the heating effect can be used as a test for water
4. the reaction is reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-17]
1. the forward reaction (L to R) is endothermic
2. on cooling the heated solid and adding water, it changes colour from blue to white
3. the heating effect can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-18]
1. the reverse reaction (R to L) is endothermic
2. on cooling the heated solid and adding water, it changes colour from white to blue
3. the heating effect can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-19]
1. the forward reaction (L to R) is exothermic
2. on cooling the heated solid and adding water, it changes colour from blue to white
3. the reverse reaction (R to L) is exothermic
4. the heating effect can be used as a test for water
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-20]
1. the forward reaction (L to R) is exothermic
2. on cooling the heated solid and adding water, it changes colour from blue to white
3. the reverse reaction (R to L) is endothermic
4. the heating effect can be used to make anhydrous copper(II) sulfate
The in the equation means the reaction is? [am-57]
1. reversible
2. decomposable
3. combustible
4. unpredictable
On the reaction profile diagrams above, which energy change corresponds to the uncatalysed activation energy for the endothermic thermal decomposition of ammonia? [am-65]
1. profile 1, E1
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the overall heat absorbed by the catalysed endothermic thermal decomposition of ammonia? [am-66]
1. profile 1, E1
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the activation energy for the iron catalysed exothermic formation of ammonia? [am-67]
1. profile 1, E1
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the overall energy change for the iron catalysed exothermic formation of ammonia? [am-68]
1. profile 1, E2
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the activation energy for the catalysed endothermic decomposition of ammonia? [am-69]
1. profile 1, E2
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the activation energy for the uncatalysed exothermic formation of ammonia? [am-70]
1. profile 1, E2
2. profile 2, E4
3. profile 1, E3
4. profile 2, E5
On the reaction profile diagrams above, which energy change corresponds to the overall energy change for the uncatalysed endothermic thermal decomposition ammonia? [am-71]
1. profile 1, E2
2. profile 2, E4
3. profile 1, E3
4. profile 2, E5
On the reaction profile diagrams above, which energy change corresponds to the overall energy change for the uncatalysed exothermic formation of ammonia? [am-72]
1. profile 1, E2
2. profile 2, E4
3. profile 1, E3
4. profile 2, E6
Which is TRUE about reversible reactions and chemical equilibrium? [am-85]
1. increase in temperature favours an endothermic reaction
2. decrease in temperature favours the reaction absorbing heat
3. increase in pressure favours a reaction forming the most gas molecules
4. decrease in pressure favours a reaction that removes gas molecules
Which is TRUE about reversible reactions and chemical equilibrium? [am-86]
1. increase in temperature favours the heat releasing reaction
2. decrease in temperature favours an exothermic reaction
3. increase in pressure favours a reaction forming gas molecules
4. decrease in pressure favours the reaction forming the least gas molecules
Which is TRUE about reversible reactions and chemical equilibrium? [am-87]
1. increase in temperature favours the heat releasing reaction
2. decrease in temperature favours an endothermic reaction
3. increase in pressure favours the reaction forming the least gas molecules
4. decrease in pressure does not favour a reaction forming gas molecules
Which is TRUE about reversible reactions and chemical equilibrium? [am-88]
1. increase in temperature favours an exothermic reaction
2. decrease in temperature favours a heat absorbing reaction
3. increase in pressure favours a reaction forming gas molecules
4. decrease in pressure favours the reaction forming the most gas molecules
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-89]
1. increased pressure favours a larger % of ammonia in the equilibrium mixture
2. decrease in temperature does not favour a larger % of ammonia in the equilibrium mixture
3. using a catalyst increases the % of ammonia in the equilibrium mixture
4. increasing both pressure and temperature favour ammonia formation
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-90]
1. increased pressure does not favour a larger % of ammonia in the equilibrium mixture
2. decrease in temperature favours a larger % of ammonia in the equilibrium mixture
3. using a catalyst increases the % of ammonia in the equilibrium mixture
4. increasing both pressure and temperature favour ammonia formation
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-91]
1. decreased pressure favours a larger % of ammonia in the equilibrium mixture
2. increase in temperature favours a larger % of ammonia in the equilibrium mixture
3. using a catalyst does not affect the % of ammonia in the equilibrium mixture
4. decreasing both pressure and temperature favour ammonia formation
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-91]
1. decreased pressure favours a larger % of ammonia in the equilibrium mixture
2. increase in temperature favours a larger % of ammonia in the equilibrium mixture
3. using a catalyst increases the % of ammonia in the equilibrium mixture
4. increasing pressure and decreasing temperature both favour ammonia formation
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-93]
1. reactants are always changing into products
2. rate of forward reaction (L to R) is greater than the rate of the backward reaction (R to L)
3. the concentrations of reactants and products are constantly changing
4. using a catalyst increases the final amount of product formed
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-94]
1. products stop changing into reactants
2. rate of forward reaction (L to R) is equal to the rate of the backward reaction (R to L)
3. the concentrations of reactants and products are constantly changing
4. using a catalyst increases the final amount of product formed
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-95]
1. products stop changing into reactants
2. rate of forward reaction (L to R) is greater than the rate of the backward reaction (R to L)
3. the concentrations of reactants and products remain the same
4. using a catalyst increases the final amount of product formed
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-96]
1. products stop changing into reactants
2. rate of forward reaction (L to R) is greater than the rate of the backward reaction (R to L)
3. the concentrations of reactants and products are constantly changing
4. using a catalyst does not increase the final amount of product formed
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-97]
1. decreasing the pressure favours a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature does not favour a bigger % of hydrogen in the equilibrium mixture
3. using a catalyst increases the final % of hydrogen in the equilibrium
4. increasing both pressure and temperature favours the formation of ammonia
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-98]
1. decreasing the pressure does not favour a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature favours a bigger % of hydrogen in the equilibrium mixture
3. using a catalyst increases the final % of hydrogen in the equilibrium
4. increasing both pressure and temperature favours the formation of ammonia
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-99]
1. decreasing the pressure does not favour a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature does not favour a bigger % of hydrogen in the equilibrium
3. using a catalyst does not increase the final % of hydrogen in the equilibrium
4. increasing both pressure and temperature favours the formation of ammonia
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-100]
1. decreasing the pressure does not favour a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature does not favour a bigger % of hydrogen in the equilibrium
3. using a catalyst increases the final % of hydrogen in the equilibrium
4. decreasing the pressure and increasing the temperature both favour the formation of ammonia

Practise exam questions on reversible reactions & chemical equilibrium (harder higher tier GCSE level chemistry)