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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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33 cards
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1
the colour of the solution after fluorine is bubbled through sodium iodide solution is ...
colourless
green
orange
brown
2
chlorine is more reactive than bromine because
chlorine is bigger and accepts electrons more easily
chlorine is bigger and loses electrons more easily
chlorine is smaller and loses electrons more easily
chlorine is smaller and accepts electrons more easily
3
when hydrogen chloride is added to water litmus goes red because ...
hydrogen chloride has dissociated
all of these
an acid has been made
H+ ions have been produced
4
what is the colour of Cu metal?
pinky-brown
silver
grey
yellow
5
a redox reaction occurs when ...
fizzing is seen
neutralisation happens
a precipitate is seen
one substances loses oxygen the others gains it
6
the chemical test for oxygen is ...
glowing spill gives a squeaky pop
glowing spill relights
lit spill gives a squeaky pop
lit spill is extinguished
7
the chemical name for rust is hydrated iron(III) oxide. What does (III) mean?
iron has a charge of -3
there are three iron atoms
iron has a charge of +3
iron has three water molecules attached
8
which metal coats iron during galvanising?
potassium
aluminium
tin
zinc
9
potassium is more reactive than sodium because
its atom is larger and its gains electrons more easily
its atom is smaller and its gains electrons more easily
its atom is larger and its loses electrons more easily
its atom is smaller and its loses electrons more easily
10
copper is less reactive than zinc. When zinc is added to copper sulfate solution you will see
a pink brown solid is seen
a colourless solution goes blue
the solution stays blue
the blue solution becomes colourless
11
oxygen supports combustion. If methane (CH
4
) is burned in excess oxygen the gas made is ...
water
carbon dioxide
carbon monoxide
there is no gas
12
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
13
the approximate percentage of oxygen in air is ...
1%
80%
5%
20%
14
the equation for the reaction between chlorine and potassium bromide is ...
Cl2 + KBr2 → KCl2 + Br2
Cl + KBr → KCl + Br
Cl2 + KBr → KCl + Br2
Cl2 + 2KBr → 2KCl + Br2
15
what is need for iron to rust?
carbon dioxide
water
air & water
air
16
what is the colour of bromine solution?
green
colourless
black
orange-red
17
chlorine is used in swimming pools because ...
it smells nice
it helps you float
it makes the water bluer
it is toxic and kills bacteria
18
Why does an element belong to group 1?
it has one electron in its last shell
it has one electron
it has one electron in each shell
it needs one electron to get to 8 electrons
19
the formula for oxygen gas is
O
O2
O2-
O2
20
that gas made when lithium is added to water is ...
nitrogen
oxygen
hydrogen
argon
21
no displacement happens when iodine is added to sodium bromide solution because ...
iodine is more reactive than bromine
bromine is loess reactive than iodine
it is not hot enought
iodine is less reactive than bromine
22
the following is an example of a redox reaction ...
2NaOH + FeCl2 → 2NaCl + Fe(OH)2
CaCO3 → CaO + CO2
Cl2 + 2KBr → 2KCl + Br2
NaOH + HCl → NaCl + H2O
23
when potassium reacts it is oxidised because ...
potassium gains electrons
potassium loses electrons
24
complete the word equation for chlorine + potassium iodide →
iodine + potassium chloride
potassium + chlorine iodide
no reaction
potassium + iodine chloride
25
chlorine belongs to group 7. What is the alternative name for group 7?
Noble gases
transition metals
halogens
alkali metals
26
reduction happens when an chemical gains electrons. What happens during oxidation?
a substance loses electrons
a substance gains neutrons
hydrogen is gained
a substance gains protons
27
F
2,
Cl
2
, Br
2
and I
2
are halogens. Place them in order of reactivity - most reactive first
iodine, bromine, chlorine, fluorine
fluorine. chlorine, bromine, iodine
bromine, chlorine, fluorine, iodine
iodine, fluorine, bromine, chlorine
28
the electron arrangement in sodium (
11
Na) is ...
2, 1, 8
11
2, 8, 1
1, 8, 2
29
when litmus solution added to the solution made when potassium reacts with water it goes blue
a precipitate is made
an alkali is made
because an acid is made
a neutral solution is made
30
when 100 cm
3
of air is passed over an excess of heated copper the final volume is ..
100 cm3
20 cm3
0 cm3
80 cm3
31
potassium is added to cold water you can see ...
a blue solution
a pinky-purple (lilac) flame
potassium sinks
fizzing
32
What is the main gas in the atmosphere?
nitrogen
argon
carbon dioxide
oxygen
33
put the following metals in order of reactivity; the
least
reactive first - Cu, Fe & Zn
iron, zinc, copper
zinc, copper, iron
copper, iron, zinc
copper, zinc, iron
