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GCSE Edexcel IGCSE Rates & Equilibria Quiz

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Rates, equilibrium, and practicals

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United Arab Emirates

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GCSE Edexcel IGCSE Rates & Equilibria Quiz
 

GCSE Edexcel IGCSE Rates & Equilibria QuizOnline version

Rates, equilibrium, and practicals

by Tala Tadros
1

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

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?

3

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

4

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

5

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

6

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

7

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

8

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

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?

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?

11

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

12

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

13

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

14

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

15

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

16

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

17

Identify the system shown that transports blood throughout the body.

18

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

19

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

20

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

Feedback

Temperature raises kinetic energy, making more particles have energy > activation energy.

Activation energy is the minimum energy for a successful collision.

Higher pressure brings molecules closer, increasing collision frequency.

At dynamic equilibrium, the concentrations remain constant over time.

Adding reactants favours the reverse reaction to re-establish balance.

The cross method using marble chips and HCl is a classic rate observation.

A catalyst lowers activation energy but doesn't alter equilibrium composition.

Temperature drives dehydration/rehydration equilibrium of the salt.

Rate doubling when concentration doubles indicates second-order dependence.

Greater surface area allows more contact between solid and water, speeding dissolution.

Correct: Jupiter is home to the Great Red Spot, a massive storm that has raged for centuries.

Plants use carbon dioxide in photosynthesis to produce sugars.

Mitochondria generate most of the cell’s energy in the form of ATP.

Melting is the transition from solid to liquid when heat is added.

Gravity pulls objects toward the center of the Earth.

Condensation forms clouds as water vapor cools and changes to liquid.

The circulatory system moves blood via vessels and the heart.

A lever uses a fulcrum to amplify input force.

Condensation forms liquid water from water vapor as it cools.

Earth is a rocky, terrestrial planet.

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