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Course: HIA International — Grade 6
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HIA International — Grade 6

Unit 1: Cells and organisms

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Unit 2: States of matter, atoms and compounds

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Unit 3: The Solar System and energy

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Unit 4: Living organisms and classification

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Unit 5: Metals, non-metals, acids and alkalis

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Unit 6: Sound, the Earth and eclipses

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Unit 7: Microorganisms and food webs

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Unit 8: Chemical reactions

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Unit 9: Electricity and circuits

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Quiz

8.1 Simple Chemical Reactions

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Simple Chemical Reactions Checkpoint Chemistry quiz: free practice for Cambridge Checkpoint (chemistry). Work through this Simple Chemical Reactions Checkpoint Chemistry quiz and get instant feedback on every answer. If you get stuck, review the 11.1 Simple chemical reactions lesson. More practice: Cambridge Checkpoint (chemistry) — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 45
  • Passing grade: B+
  • Time limit:
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1.
Which statement best expresses the lesson objective about Simple chemical reactions?
Describe chemical properties of some metals
The terms chemical reaction and combine are always interchangeable
Evidence is unnecessary when studying Simple chemical reactions
Every model is an exact copy of reality
2.
Which practical work belongs to Simple Chemical Reactions?
Relate neutralisation to antacids, soil treatment and industrial waste treatment
Use observations, precipitates, temperature change and gas tests as evidence of reaction
Plan and evaluate a fair test comparing acids, alkalis or neutralisation reactions
Compare metal reactions and use the hydrogen “pop” test safely under supervision
3.
Maryam set up the test tube shown in the diagram. Apart from the gas, which new substance is formed in the tube?
Dr Dabour Hub Academy - figure 1
Zinc sulfate
Zinc oxide powder
Zinc chloride
Zinc carbonate
4.
Hamza added four metals to the same dilute acid and collected the gas. Which conclusion is best supported by his bar chart?
Dr Dabour Hub Academy - figure 2
Magnesium reacted fastest, and copper showed no sign of reacting
Every metal reacts with dilute acid to make hydrogen gas
Iron reacted faster than zinc because iron is a stronger metal
Zinc made more gas than magnesium in the two minutes
5.
The diagram shows the particles before and after charcoal (carbon) burns in oxygen. Which statement correctly describes what the diagram shows?
Dr Dabour Hub Academy - figure 3
Two new oxygen atoms have been made during burning
The carbon atoms have changed into oxygen atoms
The atoms have joined to make a mixture of carbon and oxygen
The same six atoms are joined in a new way to make a new substance
6.
Oliver heated copper carbonate and weighed the solid every minute. Why did the mass stop changing after about 6 minutes?
Dr Dabour Hub Academy - figure 4
The black solid began taking carbon dioxide back in
All of the copper carbonate had broken down
Mass is conserved, so it could not fall any lower
The solid had become too hot to lose any more mass
7.
Kwame drew gases from a burning candle through the apparatus shown. A colourless liquid collected in the cold U-tube. What is the liquid most likely to be?
Dr Dabour Hub Academy - figure 5
Melted wax carried up by the air
Limewater that flowed back
Liquid oxygen from the air
Water made when the wax burned
8.
The diagram shows four observations made in class. Which one is NOT evidence that a chemical reaction has taken place?
Dr Dabour Hub Academy - figure 6
Observation D
Observation A
Observation B
Observation C
9.
Mina heated four solids, W to Z, and let them cool. Which solid underwent thermal decomposition?
Solid labelled W
Solid labelled X
Solid labelled Y
Solid labelled Z
10.
One of Carlos's word equations is wrong. Which row is wrong, and why?
Row 1 – burning methane makes only carbon dioxide
Row 3 – heating calcium carbonate makes oxygen
Row 2 – a metal and an acid make a salt and hydrogen
Row 4 – copper cannot combine with oxygen
11.
Each option pairs a reaction with the gas from the table that it produces. Which pairing is correct?
Zinc added to dilute sulfuric acid – gas P
Heating calcium carbonate – gas Q
Zinc added to dilute sulfuric acid – gas Q
Burning methane in air – gas P
12.
Yusuf heated iron filings with sulfur. Which evidence from the table best shows that a new substance was made?
The black solid is not magnetic and reacts differently with acid
The iron filings are grey and the sulfur is yellow
Both starting substances were powders before heating
Sulfur does not react with the dilute acid
13.
In the word equation "methane + oxygen → carbon dioxide + water", which substances are the reactants?
Carbon dioxide and water
Methane and oxygen
Methane and water
Oxygen and carbon dioxide
14.
Limestone (calcium carbonate) is heated strongly in a kiln to make lime. What type of reaction is this?
Neutralisation reaction
Combustion of a fuel
Rusting of a metal
Thermal decomposition
15.
Which is the best evidence that burning a sheet of paper is a chemical change?
The paper gets hot while it burns
The paper changes shape as it curls up
New substances such as ash and smoke form and cannot be turned back into paper
The paper becomes smaller and lighter
16.
Why does the teacher test only a small test tube of hydrogen with a lighted splint?
Hydrogen is flammable, and a large volume could explode
Hydrogen is poisonous, so it must be kept small
A lot of hydrogen would put the splint out
Hydrogen is heavy and would spill onto the bench
17.
When shiny copper foil is heated in air, the surface turns black and the foil gains mass. Which word equation describes this?
copper → copper oxide + oxygen
copper oxide → copper + oxygen
copper + carbon → copper carbonate
copper + oxygen → copper oxide
18.
A glass jar is placed over a burning candle. After a few seconds the flame goes out. Why?
The carbon dioxide made by the flame cooled the wax
The oxygen needed for combustion has been used up
The jar stopped the wax from melting
The flame used up all the wax in the candle
19.
Which of these is a chemical property of magnesium, rather than a physical property?
It is shiny and grey when freshly cut
It conducts electricity well
It fizzes in dilute acid, giving off hydrogen
It can be bent into a coil
20.
What products are always formed when a metal reacts with an acid?
A salt and water only
A salt and hydrogen gas
An oxide and oxygen gas
Carbon dioxide and water
21.
Each option pairs a type of reaction with an everyday example. Which pairing is correct?
Combustion – an iron gate turning orange-brown
Thermal decomposition – heating limestone to make lime
Oxidation – ice melting on a path
Neutralisation – methane burning in a cooker
22.
Each option pairs an observation with the reaction that causes it. Which pairing is correct?
Fizzing – an iron gate slowly rusting
Orange-brown solid – methane burning in a cooker
Temperature rise – ice cube melting in a drink
Bright white light – magnesium burning in air
23.
Each option pairs a key term with a meaning. Which pairing is correct?
Reactant – a substance made by the reaction
Word equation – a list of the equipment used
Product – a new substance formed in a reaction
Oxidation – the loss of oxygen
24.
Match the term to its correct meaning: word equation
a particle made of two or more atoms chemically joined
a reaction written with the names of the reactants and products
the unchanging proportion in which elements combine in a compound
a reaction written using chemical formulae
25.
Farah poured one solution into the other while both beakers stayed on the balance, as shown. A blue solid formed and no gas was given off. The new balance reading will be _____.
Dr Dabour Hub Academy - figure 7
exactly 120.4 g
more than 120.4 g
less than 120.4 g
about zero grams
26.
The new substances formed in a chemical reaction are called the _____.
reactants
mixtures
products
elements only
27.
When magnesium reacts with dilute sulfuric acid, the salt formed is _____.
magnesium chloride
magnesium sulfate
magnesium oxide
magnesium carbonate
28.
Rust forms when iron reacts with _____, making hydrated iron oxide.
water and salt only
carbon dioxide
nitrogen and water
oxygen and water
29.
The total mass of the products is always less than that of the reactants. - True or false?
True
False
30.
In a combustion reaction the fuel is oxidised. - True or false?
True
False
31.
Oxidation is the gain of oxygen. - True or false?
True
False
32.
Mass appears to increase when magnesium burns because new matter is created. - True or false?
True
False
33.
Atoms are created and destroyed in a chemical reaction. - True or false?
True
False
34.
The results show that iron needs both oxygen (from air) and water to rust. True or false?
True – the statement is correct
False – tube C shows that water alone is enough
False – tube B shows that air alone is enough
False – rust only forms when salt is present
35.
Sami says the candle lost 2.5 g because that mass of wax was destroyed by burning. True or false?
True – the statement is correct
False – it became gases that escaped into the air
True, as fire destroys atoms
True, but only the wick is lost
36.
Fizzing when a metal is added to an acid shows that a gas is being made. True or false?
False – fizzing shows the metal is melting
False – fizzing shows that the acid is boiling
False – fizzing shows a physical change only
True – the statement is correct
37.
Melting candle wax is a chemical reaction because the wax changes its appearance. True or false?
True – the statement is correct
False – no new substance forms
True, because heat is always needed
True, but only for coloured wax
38.
Burning natural gas (methane) in a cooker produces carbon dioxide and water. True or false?
False – it produces only hydrogen gas
False – it produces oxygen and carbon
True – the statement is correct
False – it produces methane oxide and water
39.
The product of a chemical reaction has exactly the same properties as the reactants that made it. True or false?
False – a new substance has new properties
True – the statement is correct
True, as the atoms are the same
True, but only for metals
40.
When magnesium reacts with dilute hydrochloric acid, the gas given off is oxygen. True or false?
True – the statement is correct
True, because the acid contains oxygen
True, as it relights a glowing splint
False – the gas is hydrogen
41.
Frying an egg is a chemical change, because new substances form that cannot be turned back into raw egg. True or false?
False – cooling the egg turns it back to raw egg
True – the statement is correct
False – cooking is always a physical change
False – no substances change when food is heated
42.
A temperature rise when two solutions are mixed can be evidence that a chemical reaction has happened. True or false?
False – temperature never changes in reactions
False – only colour changes count as evidence
True – the statement is correct
False – a temperature rise means the liquid is boiling
43.
A lighted splint "pops" in a tube of hydrogen because the hydrogen burns quickly with oxygen from the air. True or false?
True – the statement is correct
False – the pop is air escaping
False – the pop is the splint snapping
False – hydrogen puts the flame out silently
44.
In the word equation zinc + hydrochloric acid → zinc chloride + hydrogen, zinc chloride is a reactant. True or false?
True – the statement is correct
True, because it contains zinc
True, as it is written first
False – it is a product
45.
When an acid reacts with an alkali, a salt and water are formed. True or false?
True – the statement is correct
False – hydrogen and a salt form
False – an oxide and oxygen form
False – carbon dioxide forms
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Part of Unit 8: Chemical reactions — see every lesson and quiz in this unit.
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