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Chemistry of the elements revision#sgschem Flashcards | StudBud
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Chemistry of the elements revision#sgschem
Chemistry of the elements revision#sgschem
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Year 10 revision questions for IGCSE inorganic chemistry#sgschem
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50 cards
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Practice quiz
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Questions
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Answers
1
green ppt with sodium hydroxide & cream ppt with silver nitrate identifies a compound as
iron(III) bromide
iron(II) iodide
copper bromide
iron(II) bromide
2
the equation for the reaction between chlorine and potassium bromide is ...
Cl2 + KBr → KCl + Br2
Cl2 + 2KBr → 2KCl + Br2
Cl + KBr → KCl + Br
Cl2 + KBr2 → KCl2 + Br2
3
Why does an element belong to group 1?
it needs one electron to get to 8 electrons
it has one electron in its last shell
it has one electron
it has one electron in each shell
4
Litmus is an indicator. What colour does it show in an acid?
purple
blue
green
red
5
what solution can be used to detect chloride, bromide or iodide ions?
sulphuric acid
silver nitrate
barium chloride
limewater
6
oxygen supports combustion. If methane (CH
4
) is burned in excess oxygen the gas made is ...
water
there is no gas
carbon monoxide
carbon dioxide
7
no displacement happens when iodine is added to sodium bromide solution because ...
bromine is loess reactive than iodine
iodine is less reactive than bromine
it is not hot enought
iodine is more reactive than bromine
8
F
2,
Cl
2
, Br
2
and I
2
are halogens. Place them in order of reactivity - most reactive first
bromine, chlorine, fluorine, iodine
iodine, fluorine, bromine, chlorine
iodine, bromine, chlorine, fluorine
fluorine. chlorine, bromine, iodine
9
copper is less reactive than zinc. When zinc is added to copper sulfate solution you will see
the blue solution becomes colourless
the solution stays blue
a pink brown solid is seen
a colourless solution goes blue
10
the approximate percentage of oxygen in air is ...
20%
5%
80%
1%
11
what is need for iron to rust?
water
air & water
carbon dioxide
air
12
when potassium reacts it is oxidised because ...
potassium loses electrons
potassium gains electrons
13
when 100 cm
3
of air is passed over an excess of heated copper the final volume is ..
0 cm3
100 cm3
80 cm3
20 cm3
14
brick red flame test & white ppt with silver nitrate identifies a compound as ...
potassium chloride
calcium iodide
calcium chloride
magnesium bromide
15
a redox reaction occurs when ...
a precipitate is seen
one substances loses oxygen the others gains it
neutralisation happens
fizzing is seen
16
What is the main gas in the atmosphere?
oxygen
argon
nitrogen
carbon dioxide
17
the electron arrangement in sodium (
11
Na) is ...
2, 1, 8
2, 8, 1
11
1, 8, 2
18
blue ppt with sodium hydroxide & fizzing with HCl identifies a compound as ...
copper sulfate
iron(II) carboanate
potassium sulfate
copper carbonate
19
reduction happens when an chemical gains electrons. What happens during oxidation?
hydrogen is gained
a substance gains neutrons
a substance loses electrons
a substance gains protons
20
alkaline gas with sodium hydroxide & white ppt with barium chloride identifies a compound as
copper carbonate
potassium sulfate
ammonium sulfate
ammonium carbonate
21
the formula of the green ppt formed when iron(II) bromide is added to sodium hydroxide is ...
Fe(OH)3
NaBr
Fe(OH)2
FeOH2
22
the gas produced when nitric acid is added to copper carbonate is ...
carbon dioxide
hydrogen
nitrogen
chlorine
23
the colour of the solution after fluorine is bubbled through sodium iodide solution is ...
orange
colourless
brown
green
24
potassium is added to cold water you can see ...
fizzing
a pinky-purple (lilac) flame
a blue solution
potassium sinks
25
the following is an example of a redox reaction ...
NaOH + HCl → NaCl + H2O
Cl2 + 2KBr → 2KCl + Br2
2NaOH + FeCl2 → 2NaCl + Fe(OH)2
CaCO3 → CaO + CO2
26
chlorine is more reactive than bromine because
chlorine is smaller and loses electrons more easily
chlorine is bigger and loses electrons more easily
chlorine is smaller and accepts electrons more easily
chlorine is bigger and accepts electrons more easily
27
flame tests can be used to detect certain metal ions. The flame is lilac, the metal
ion
is ...
K+
Ca2+
K
Na+
28
lilac flame test & white ppt with barium chloride identifies a compound as ...
calcium iodide
magnesium bromide
potassium chloride
potassium sulfate
29
When NaOH(aq) is added to ammonium chloride and heated, the gas released ...
turns litmus green
turns litmus blue
turns litmus red
turns litmus purple
30
which metal coats iron during galvanising?
zinc
aluminium
potassium
tin
31
complete the word equation for chlorine + potassium iodide →
no reaction
iodine + potassium chloride
potassium + iodine chloride
potassium + chlorine iodide
32
put the following metals in order of reactivity; the
least
reactive first - Cu, Fe & Zn
zinc, copper, iron
copper, iron, zinc
iron, zinc, copper
copper, zinc, iron
33
the formula for oxygen gas is
O2
O
O2
O2-
34
what is the colour of Cu metal?
grey
yellow
pinky-brown
silver
35
when hydrogen chloride is added to water litmus goes red because ...
an acid has been made
hydrogen chloride has dissociated
H+ ions have been produced
all of these
36
that gas made when lithium is added to water is ...
hydrogen
argon
oxygen
nitrogen
37
the chemical test for oxygen is ...
glowing spill gives a squeaky pop
lit spill gives a squeaky pop
lit spill is extinguished
glowing spill relights
38
the chemical name for rust is hydrated iron(III) oxide. What does (III) mean?
iron has a charge of +3
iron has a charge of -3
there are three iron atoms
iron has three water molecules attached
39
when bromine is bubbled through potassium iodide solution the colour becomes orange because ...
iodine is more reactive than bromine
bromine is more reactive than iodine
potassium is the most reactive metal
40
what chemical is used to detect sulphate ions when it makes a white precipitate when added?
barium chloride
silver nitrate
sodium hydroxide
limewater
41
metal ions can be detected by adding NaOH solution. The colour of a precipitate tells the ion
a blue precipitate is copper(II)
a blue precipitate is iron(III)
a blue precipitate is iron(II)
a blue precipitate is ammonium
42
a brick-red flame shows that the ion present is ...
Cu2+
Na+
Ba2+
Ca2+
43
which negative ion produces fizzing when an acid is added?
carbonate
sulfate
chloride
hydroxide
44
metal ions can be detected by adding NaOH solution. The colour of a precipitate tells the ion
a dirty green precipitate is iron(II)
a dirty green precipitate is iron(III)
a pinky-brown precipitate is copper(II)
a white precipitate is ammonium
45
chlorine belongs to group 7. What is the alternative name for group 7?
Noble gases
transition metals
alkali metals
halogens
46
chlorine is used in swimming pools because ...
it makes the water bluer
it is toxic and kills bacteria
it smells nice
it helps you float
47
when litmus solution added to the solution made when potassium reacts with water it goes blue
because an acid is made
a precipitate is made
an alkali is made
a neutral solution is made
48
what is the colour of bromine solution?
orange-red
black
colourless
green
49
if silver nitrate is added to barium chloride solution you will see ...
a yellow precipitate
a cream precipitate
a white precipitate
no precipitate
50
potassium is more reactive than sodium because
its atom is smaller and its gains electrons more easily
its atom is smaller and its loses electrons more easily
its atom is larger and its loses electrons more easily
its atom is larger and its gains electrons more easily
