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Revision of Jnr Chemistry
Revision of Jnr Chemistry
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Intro to Chemistry - Revision of Year 10 work (old school certificate questions)
Flashcards
40 cards
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Practice quiz
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Host live
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Questions
40
Answers
1
What is the chemical formula for sulfuric acid?
H2SO4
HS4O
H4SO2
HS(OH)4
2
Two metals were placed in acid and the amount of gas measured. Which is true in the first 5min?
X and Y produce gas equally quickly.
Insufficient information.
X produces gas faster than Y.
Y produces gas faster than X.
3
What is meant by ‘Other’ in the key?
Sand and calcium carbonate
Sodium chloride
Small percentages of substances not named
Fragments of shells, bones, coral and marine remains
4
When evaporation is complete after Step IV, what substance would remain in the dish?
Water
Metal
Acid
Salt
5
What are molecules of an element made of?
Atoms of the same compound
Atoms of two different compounds
Atoms of the same element
Atoms of two different elements
6
What type of reaction is shown?
Combustion
Corrosion
Neutralisation
Decomposition
7
What are the rows of the Periodic Table called?
Groups
Elements
Periods
Families
8
The Periodic Table was invented by
Marie Curie
Alessandro Volta
Dmitri Mendeleev
Glenn Seaborg
9
Which letters represent elements classified as metals?
P and T
Q, R, S and U
P, Q and T
T and U
10
Uranium is the last naturally occurring element
false
true
11
What is the name of the type of chemical reaction that produces the yellow solid?
Decomposition
Neutralisation
Precipitation
Corrosion
12
What is the percentage of iron in the nodules?
20
5
10
15
13
Which reaction is a combustion reaction?
Adding hydrochloric acid to sodium hydroxide
Mixing solutions of lead nitrate and sodium chloride
Adding sulfuric acid to calcium carbonate
Igniting a piece of magnesium metal
14
The diagram shows a model of an atom. What is the particle labelled
Y
?
Nucleus
Electron
Neutron
Proton
15
A mixture of
X
and
Y
is placed in a beaker of acid at 70°C. Which statement is correct?
X will not react and Y will not melt.
X will not melt and Y will dissolve.
X will melt and Y will dissolve.
X will react and Y will not melt.
16
In which step would new substances be formed?
Step II
Step III
Step I
Step IV
17
What is the name of the solution represented by the formula HCl?
Hydrochloric acid
Sulfuric acid
Sulfur hydroxide
Hydrogen chlorine
18
Chemistry is ...
Fascinating
... ok .... I guess
The study of matter an its interactions
The most important subject
19
Which piece of equipment would be most suitable to use instead of a beaker in Step II?
B
D
A
C
20
Which of the following energy sources contributes LEAST to the greenhouse effect?
Nuclear
Natural gas
Petroleum
Coal
21
Particles in brittle and non-brittle materials are shown. What may be one cause of brittleness?
The way the particles are held together
The space between the particles
The size of the particles
The shape of the particles
22
What is the best explanation for the shape of the graph for metal
Y
after 5 minutes?
A large amount of Y was added to the acid.
All Y was used up before 5 minutes had passed.
More Y was used than X.
Y stopped producing gas at 5 minutes.
23
Which of the following is called a greenhouse gas?
Hydrogen
Oxygen
Carbon dioxide
Nitrogen
24
What is the yellow solid formed?
Lead iodide
Sodium nitrate
Potassium chloride
Sulfur
25
21 How many hydrogen atoms does ACR – 022 have?
2
0
1
3
26
Which element is LEAST likely to react with any of the others shown?
S
P
Q
U
27
What names could be given to metals
X
and
Y
?
X=zinc, Y=copper
X=sodium, Y=magnesium
X=iron, Y=magnesium
X=sodium, Y=aluminium
28
Which component is a compound?
Oxygen
Manganese
Silicon
Water
29
What happens to atoms during a decomposition reaction?
They are destroyed.
They are created.
They are rearranged to form fewer substances.
They are rearranged to form more substances.
30
Which of the following products could be a gas at 100°C?
Petrol
Diesel
Kerosene
Lubricating Oil
31
The diagram represents a carbon atom. Which label identifies an electron?
C
A
D
B
32
Joanne mixed two clear, colourless liquids. A solid formed as the liquids mixed. This was...
corrosion
absorption
combustion
precipitation
33
Read the following description of substance Z and determine the likely chemical formula of
Z
?
H2O
H2SO4
NaOH
NH4OH
34
Which of the following products is boiling at 270°C and has 17 carbon atoms?
Diesel
Petrol
Kerosene
Lubricating oil
35
When an acid reacts with a carbonate, what gas is produced?
Hydrogen
Carbon dioxide
Oxygen
Carbon monoxide
36
Which of the following is a correct equation for the reaction of an acid and a metal?
Acid + metal →water + salt
Acid + metal →oxygen + water
Acid + metal →hydrogen + salt
Acid + metal →carbon dioxide + water
37
Which of the following is produced when zinc reacts with hydrochloric acid?
Carbon dioxide
Hydrogen
Water
Oxygen
38
What scientific idea about the formation of new compounds is represented by this diagram?
Matter becomes heavier.
Atoms can be rearranged.
Matter is created.
Atoms can change their shape.
39
Which component is most abundant?
Water
Iron
Manganese
Aluminium
40
What is the mass number of this atom?
6
3
7
10
