GCSE Edexcel IGCSE Rates & Equilibria Quiz

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Rates, equilibrium, and practicals

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Tala Tadros

Emiratos Árabes Unidos

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GCSE Edexcel IGCSE Rates & Equilibria Quiz


GCSE Edexcel IGCSE Rates & Equilibria QuizVersión en línea Rates, equilibrium, and practicals por Tala Tadros 1 Which factor increases the rate of a reaction by raising particle energy to the activation energy barrier? a Increasing temperature b Increasing pressure c Increasing particle size d Adding a catalyst 2 Collision theory states that for a reaction to occur, particles must collide with proper orientation and enough energy. What is this energy threshold called? a Activation energy b Collision energy c Activation rate d Reaction threshold 3 Which change increases the rate of reaction in a gaseous system by increasing the number of effective collisions? a Increasing surface area b Increasing pressure c Increasing volume d Lowering temperature 4 A reversible reaction reaching a state where the forward and reverse rates are equal is called what? a Dynamic equilibrium b Static equilibrium c Chemical saturation d Catalytic balance 5 Le Chatelier’s Principle predicts that adding more reactant will shift the equilibrium in which direction? a No shift b Towards catalysts c Towards reactants d Towards products 6 In the Practical Investigations of Rates, which common method measures rate by recording the time until a cross is no longer visible? a Mass loss from reacting chips b pH titration c Gas syringe collection d Marble chips with hydrochloric acid cross method 7 Which observation best indicates a catalyst has increased the rate without changing equilibrium position? a Change in final color b Faster colour change or fog clearance with the same final colour c Higher equilibrium yield d Increase in temperature 8 Hydrated copper(II) sulfate is often used in rate experiments. Which parameter most directly affects its dehydration/rehydration observed in tests? a Pressure b Volume c Temperature d Catalyst presence 9 In a data analysis task, if doubling the concentration of reactant quadruples the rate, what is the order of the reaction with respect to that reactant? a Third order b Zero order c First order d Second order 10 Ammonium chloride dissolving in water is used in some rate experiments. What is the effect of increasing surface area on its reaction rate with water? a Increases rate by exposing more particles to solvent b Decreases rate by dilution c Inhibits reaction d Has no effect on rate 11 What planet is shown in this image (hint: the red spot is a giant storm)? a Venus b Jupiter c Mars d Saturn 12 Identify the gas shown in the image that plants absorb for photosynthesis. a Nitrogen b Carbon Dioxide c Oxygen d Hydrogen 13 The diagram highlights the powerhouse of the cell. Which organelle is it? a Ribosome b Chloroplast c Nucleus d Mitochondrion 14 This image shows a solid changing to a liquid at a specific temperature. What is the process? a Melting b Freezing c Vaporization d Sublimation 15 In the image, which force keeps objects tied to Earth's surface? a Gravity b Friction c Normal force d Magnetism 16 The chart illustrates the water cycle. What is the process where water vapor becomes liquid? a Condensation b Sublimation c Precipitation d Evaporation 17 Identify the system shown that transports blood throughout the body. a Digestive System b Circulatory System c Nervous System d Respiratory System 18 Which simple machine is pictured that rotates around a fixed point to lift loads? a Inclined plane b Wheel and axle c Lever d Pulley 19 This image demonstrates a state change from gas to liquid when cooled. What is it called? a Vaporization b Deposition c Sublimation d Condensation 20 The diagram shows the Sun and planets orbiting. Which category includes Earth? a Dwarf planet b Terrestrial planet c Gas giant d Ice giant Feedback 1 Temperature raises kinetic energy, making more particles have energy > activation energy. 2 Activation energy is the minimum energy for a successful collision. 3 Higher pressure brings molecules closer, increasing collision frequency. 4 At dynamic equilibrium, the concentrations remain constant over time. 5 Adding reactants favours the reverse reaction to re-establish balance. 6 The cross method using marble chips and HCl is a classic rate observation. 7 A catalyst lowers activation energy but doesn't alter equilibrium composition. 8 Temperature drives dehydration/rehydration equilibrium of the salt. 9 Rate doubling when concentration doubles indicates second-order dependence. 10 Greater surface area allows more contact between solid and water, speeding dissolution. 11 Correct: Jupiter is home to the Great Red Spot, a massive storm that has raged for centuries. 12 Plants use carbon dioxide in photosynthesis to produce sugars. 13 Mitochondria generate most of the cell’s energy in the form of ATP. 14 Melting is the transition from solid to liquid when heat is added. 15 Gravity pulls objects toward the center of the Earth. 16 Condensation forms clouds as water vapor cools and changes to liquid. 17 The circulatory system moves blood via vessels and the heart. 18 A lever uses a fulcrum to amplify input force. 19 Condensation forms liquid water from water vapor as it cools. 20 Earth is a rocky, terrestrial planet.

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GCSE Edexcel IGCSE Rates & Equilibria QuizVersión en línea

por Tala Tadros

Which factor increases the rate of a reaction by raising particle energy to the activation energy barrier?

Collision theory states that for a reaction to occur, particles must collide with proper orientation and enough energy. What is this energy threshold called?

Which change increases the rate of reaction in a gaseous system by increasing the number of effective collisions?

A reversible reaction reaching a state where the forward and reverse rates are equal is called what?

Le Chatelier’s Principle predicts that adding more reactant will shift the equilibrium in which direction?

In the Practical Investigations of Rates, which common method measures rate by recording the time until a cross is no longer visible?

Which observation best indicates a catalyst has increased the rate without changing equilibrium position?

Hydrated copper(II) sulfate is often used in rate experiments. Which parameter most directly affects its dehydration/rehydration observed in tests?

In a data analysis task, if doubling the concentration of reactant quadruples the rate, what is the order of the reaction with respect to that reactant?

Ammonium chloride dissolving in water is used in some rate experiments. What is the effect of increasing surface area on its reaction rate with water?

What planet is shown in this image (hint: the red spot is a giant storm)?

Identify the gas shown in the image that plants absorb for photosynthesis.

The diagram highlights the powerhouse of the cell. Which organelle is it?

This image shows a solid changing to a liquid at a specific temperature. What is the process?

In the image, which force keeps objects tied to Earth's surface?

The chart illustrates the water cycle. What is the process where water vapor becomes liquid?

Identify the system shown that transports blood throughout the body.

Which simple machine is pictured that rotates around a fixed point to lift loads?

This image demonstrates a state change from gas to liquid when cooled. What is it called?

The diagram shows the Sun and planets orbiting. Which category includes Earth?

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