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Course: HIA International — Grade 8
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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Temperature And The Rate Of Reaction – Quiz

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Temperature And The Rate Of Reaction HIA Science quiz: free practice for HIA International. Work through this Temperature And The Rate Of Reaction HIA Science quiz and get instant feedback on every answer. If you get stuck, review the 26.8 Temperature And The Rate Of Reaction – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
  • Time limit:
Start Quiz
1.
Using the graph, how long did the cross take to disappear at 40 °C?
Dr Dabour Hub Academy - figure 1
70 s
40 s
25 s
120 s
2.
What does the graph show about temperature and reaction time?
Dr Dabour Hub Academy - figure 2
As temperature rises, the reaction slows
The reaction stops at 70 °C
As temperature rises, the time falls, so the rate increases
Temperature has no effect
3.
Using the graph, predict the time at 35 °C.
Dr Dabour Hub Academy - figure 3
About 10 s
About 25 s
About 55 s
About 120 s
4.
Using the bar chart, how many times faster is the reaction at 50 °C than at 20 °C?
Dr Dabour Hub Academy - figure 4
5 times
30 times
2 times
10 times
5.
In the diagram, which beaker is at the higher temperature?
Dr Dabour Hub Academy - figure 5
Both the same
Beaker Q
Cannot tell
Beaker P
6.
Why would the reaction be faster in beaker Q in the diagram?
Dr Dabour Hub Academy - figure 6
It has more particles
Its particles collide more often and more collisions exceed the activation energy
Its particles are bigger
It has fewer collisions
7.
Why is a water bath used in the apparatus shown?
Dr Dabour Hub Academy - figure 7
To make gas
To add water to the reaction
To keep the temperature constant during the reaction
To cool the thermometer
8.
Using the enzyme graph, what is the best temperature for the enzyme?
Dr Dabour Hub Academy - figure 8
About 10 °C
About 20 °C
About 40 °C
About 60 °C
9.
Why does the enzyme graph fall sharply above 40 °C, unlike ordinary reactions?
Dr Dabour Hub Academy - figure 9
The substrate is used up
Collisions have less energy
Particles slow down when heated
The enzyme is denatured and stops working
10.
Using the graph, which temperature gives the faster reaction?
Dr Dabour Hub Academy - figure 10
20 °C
Both the same
Neither reacts
40 °C
11.
Using the graph, what is the mean rate at 40 °C over the first 20 s?
Dr Dabour Hub Academy - figure 11
3 cm³/s
1.2 cm³/s
2.4 cm³/s
48 cm³/s
12.
What is the fourth step in the flow chart?
Dr Dabour Hub Academy - figure 12
The mixture is heated
Rate increases
More collisions have enough energy to react
Particles gain energy
13.
Using the bar chart, how many times longer does milk last in the fridge than in a warm room?
Dr Dabour Hub Academy - figure 13
30 times
3 times
10 times
2 times
14.
Use the table. What is the time for the cross to vanish at 60 °C?
About 25 s
About 15 s
About 40 s
About 9 s
15.
Use the table. What is the mean time at 30 °C?
72 s
70 s
68 s
210 s
16.
Use the table. Which result is anomalous?
The 30 °C result
The 60 °C result
The 50 °C result
The 20 °C result
17.
Use the table. What is the rate (1/time) at 40 °C?
40 per second
0.004 per second
0.025 per second
0.25 per second
18.
Use the table. Which temperature has the highest collision frequency?
70 °C
20 °C
40 °C
50 °C
19.
A student's notes contain one mistake. Which row?
Heating makes particles move faster
Rate roughly doubles every 10 °C
Heating makes particles bigger
More collisions have enough energy
20.
Use the table. Which conclusion is correct?
The reaction slowed down
The time increased
Doubling the temperature from 20 °C to 40 °C made the reaction three times faster
Temperature had no effect
21.
Why does raising the temperature increase the rate of reaction?
Particles get bigger
Particles stop moving
More reactant is created
Particles move faster, collide more often and with more energy
22.
What is activation energy?
The energy of the products
The energy of a water bath
The heat given out
The minimum energy a collision needs for a reaction to happen
23.
What is a successful collision?
Any collision at all
A collision that makes heat only
A collision with enough energy to cause a reaction
A collision in a water bath
24.
What is kinetic energy?
Energy from light
The energy particles have because they are moving
Energy stored in bonds
Energy in a battery
25.
As a rough rule, what happens to the rate for every 10 °C rise?
It halves
It roughly doubles
It increases tenfold
It stays the same
26.
Does raising the temperature change the total amount of product?
It stops the reaction
Yes, it halves the product
Yes, it doubles the product
No, only the rate
27.
Why do enzyme reactions slow down above about 40 °C?
The enzymes are denatured and stop working
There are fewer collisions
The particles slow down
The water boils
28.
What is a water bath used for?
Holding a reaction at a set temperature
Measuring gas volume
Cooling products to 0 °C
Weighing reactants
29.
Why is food kept in a fridge?
Low temperature slows the reactions that spoil it
Cold kills all bacteria instantly
Fridges remove oxygen
Cold adds preservatives
30.
A reaction takes 80 s at 30 °C. Using the rough rule, about how long will it take at 40 °C?
10 s
80 s
160 s
40 s
31.
Which statement uses the correct scientific wording?
Particles collide more
The heat makes more atoms
Particles get bigger when heated
Particles collide more frequently and with more energy
32.
Why should the solutions be warmed separately before mixing in a temperature experiment?
To make more product
To avoid using a thermometer
To slow the reaction
So the reaction starts at the chosen temperature
33.
Why should the temperature be recorded at the start and the end of each run?
To check it stayed close to the set value
It is not needed
To measure the rate
To find the mass
34.
A student wants to find how temperature affects the rate of magnesium with acid. Which plan is best?
Use equal lengths of magnesium and equal volumes of the same acid at several temperatures in a water bath, timing gas production
Use different lengths of magnesium each time
Use one temperature only
Change the acid concentration and temperature together
35.
Which pairing of temperature and time for the cross is correct?
40 °C - about 9 s
20 °C - about 120 s
70 °C - about 120 s
30 °C - about 15 s
36.
Which pairing of change and effect is correct?
Higher temperature - faster rate
Higher temperature - fewer collisions
Enzyme at 60 °C - fastest rate
Lower temperature - faster rate
37.
Use the table. How many times faster is the reaction at 60 °C than at 20 °C?
8 times
2 times
3 times
40 times
38.
Use the table. Which storage temperature keeps bread fresh longest?
Fridge
Kitchen shelf
Warm cupboard
Freezer
39.
Match the term to its description: Water bath
Energy of moving particles
Minimum energy for reaction
A successful collision
Apparatus used to hold a reaction at a set temperature
40.
The minimum energy needed for a collision to cause a reaction is the _____ energy.
thermal
kinetic
activation
potential
41.
Heating makes particles move _____.
nowhere
faster
backwards
slower
42.
If a reaction takes 100 s at 20 °C, it takes about _____ at 30 °C.
10 s
200 s
50 s
100 s
43.
Raising the temperature increases both how often particles collide and how hard. True or false?
False, it has no effect
False
True
False, only how hard
44.
Temperature changes the total amount of product. True or false?
True
False
True, but only for gases
True, more heat means more product
45.
Only collisions with at least the activation energy cause a reaction. True or false?
False, every collision reacts
True
True, but only in water
False
46.
Heating an enzyme reaction to 70 °C will always make it faster. True or false?
False
True, enzymes love heat
True, like all reactions
True
47.
Cooking food faster in a pressure cooker works because the temperature is higher. True or false?
True, but only for water
False
False, pressure cookers are colder
True
48.
Particles get bigger when they are heated. True or false?
True, that is why they collide more
True, but only gases
False
True
49.
A reaction that takes 60 s at 25 °C would roughly take 30 s at 35 °C. True or false?
False, 120 s
False, 60 s
False
True
50.
In the gas graph, the reaction at 40 °C stops sooner than the one at 20 °C. True or false?
Dr Dabour Hub Academy - figure 14
False
False, 20 °C stops first
False, they stop together
True
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Part of Unit 8: Rates of reaction — see every lesson and quiz in this unit.
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