Lesson 4.5.1.1
4.5.1.1 Energy transfer during exothermic and endothermic reactions Quiz: AQA Chemistry, Unit 5
20 questions
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Lesson 4.5.1.1, Energy transfer during exothermic and endothermic reactions: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 5: Energy changes, written with Revision Ninja.
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The 20 questions
-
In an exothermic reaction, what happens to the temperature of the surroundings?
- It stays constant
- It increases
- It decreases
- It becomes zero
-
Which everyday item cools when its reaction is used?
- Instant cold pack
- Hand warmer
- Self-heating can
- Charcoal burner
-
Which of these is an exothermic reaction?
- Neutralisation
- Thermal decomposition
- Photosynthesis
- Electrolysis
-
Which statement about the surroundings in neutralisation is correct?
- It rises
- It becomes zero
- It stays constant
- It falls
-
Which device uses an exothermic reaction for everyday use?
- Sports injury pack
- Ice pack
- Fraternal cooler
- Self-heating can
-
Some sports injury packs are based on which type of reaction?
- Redox only
- Endothermic reactions
- Neutral reactions
- Exothermic reactions
-
What fundamental law applies to energy in all chemical reactions?
- Conservation of energy
- Constant proportions
- Conservation of mass
- Reversible equilibrium
-
In an exothermic reaction, how does the energy of the products compare?
- Less than reactants
- Zero overall
- Equal to reactants
- More than reactants
-
Water in a beaker warms from 20 C to 26 C during a reaction. What type of reaction is this?
- Endothermic
- Exothermic
- Neutral
- Reversible only
-
The temperature of a solution falls from 22 C to 17 C during a reaction. What type of reaction is this?
- Catalytic
- Neutral
- Exothermic
- Endothermic
-
Combustion of methane is which type of reaction?
- Exothermic
- Endothermic
- Non-energetic
- Neutral
-
What happens to the temperature in an endothermic reaction like citric acid and sodium hydrogencarbonate?
- It fluctuates rapidly
- It rises
- It stays constant
- It falls
-
Why are endothermic reactions used in instant sports injury packs?
- They release heat
- They produce gas
- They generate light
- They absorb heat
-
Which measurement is used in required practical 4 to show whether a reaction is exothermic or endothermic?
- Colour change
- Pressure change
- Temperature change
- Mass change
-
Which chemical process is classified as exothermic?
- Neutralisation
- Thermal decomposition
- Melting ice
- Photosynthesis
-
A student sees the temperature rise when magnesium reacts with acid. What does this show?
- An exothermic reaction
- No energy change
- Equilibrium is reached
- An endothermic reaction
-
What type of energy transfer occurs in a self-heating can?
- Photochemical
- Endothermic
- Catalytic
- Exothermic
-
In an exothermic reaction, the energy released to surroundings equals what value?
- Energy drop to products
- Energy rise to reactants
- Zero overall change
- Total activation energy
-
Which type of reaction causes the surrounding temperature to decrease?
- Endothermic
- Combustion
- Exothermic
- Oxidation
-
In an endothermic reaction, how do product and reactant energies compare?
- Products have less
- Products have more
- Energies are equal
- Reactants have double
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