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AQA GCSE C1 Chemistry (quiz 1) Flashcards | StudBud
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AQA GCSE C1 Chemistry (quiz 1)
AQA GCSE C1 Chemistry (quiz 1)
32 terms
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#AQA #chemistry #core
Flashcards
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Answers
1
What is a substance made of only one kind of atom called?
a mixture
an element
a compound
a metal
2
Which of these products is not made from polymers?
hydrogel wound dressings
memory foam
biodiesel
nylon
3
What happens to bromine water when an alkene is added to it?
It turns orange to colourless.
It turns from colourless to orange.
It turns cloudy.
It explodes.
4
Why is sulphur often removed from fuels before they are burnt?
To reduce acid rain.
So the fuel produces less soot when it burns.
To reduce the cost of the fuel.
To decrease its effect on the ozone layer.
5
What percentage of the Earth's atmosphere is composed of oxygen?
21%
25%
79%
81%
6
True or False? "When forming an ionic bond, metal atoms lose electrons to form positive ions."
True
False
7
How many hydrogen atoms does ethane contain?
6
4
2
8
8
What is the effect called in which solid particles in the atmosphere block some sunlight?
global dimming
global warming
shadowing
depletion of the ozone
9
Which of the methods below could not be used to crack a long-chain hydrocarbon?
Heat it to a high temperature and pass over a hot catalyst.
Put it under high temperatures and pressures.
Mix it, as a vapour, with H2O(g) and heat it to a high temp.
Mix it with water and add a cold platinum catalyst.
10
Which of the following is not needed during fermentation to produce ethanol?
temperature of 35°C
air
yeast
water
11
True or False? All of the elements in Group 0 have no electrons in their highest energy level.
False
True
12
True or False? "Aluminium has a high density, but is resistant to corrosion."
True
False
13
What is produced when zinc carbonate thermally decomposes?
zinc oxide and carbon dioxide
zinc and oxygen
CO2 and O2
Zn and O
14
What happens to an unsaturated oil reacted with H
2
in the presence of a Ni catalyst at 60°C?
It is thickened
Nothing happens
It is softened
It is hardened
15
______-chain hydrocarbons have _______ boiling points.
...long....low...
,,,short....low...
...long....high...
...short.....high...
16
True or False? "All metals are found in the ground as ores."
False
True
17
True or False? "Wegener's theory of continental drift wasn't accepted for many years."
False
True
18
One can usually find __________ in layers of limestone.
plant growth
crude oil
money
fossils
19
Particles of the same element all have the same number of _____________.
electrons
ions
neutrons
protons
20
True or False? "Hydrogenated oils have higher melting points than unsaturated oils."
True
False
21
True or False? A mixture can only be separated into its parts by breaking the chemical bonds.
True
False
22
Why is bioleaching used to extract copper from its ore?
Supplies of copper ores are limited.
It can be used on low-grade ores.
It produces very pure copper easily.
It's quicker than smelting.
23
Where are earthquakes and volcanic eruptions most likely to occur?
anywhere in the Earths mantle
far from plate boundaries
near to plate boundaries
anywhere on the Earth's crust
24
True or False? "Emulsions are thicker than oil or water."
True
False
25
True or False? "Crude oil is a renewable fuel."
False
True
26
Which of these is a social impact of metal extraction?
The industry provides jobs for local people.
Resources are used up quickly.
It can destroy the habitats of animals.
There's a finite amount of metal ore in the Earth.
27
How far do tectonic plates typically move (relative to each other) each year?
a few metres
a few centimetres
a few kilometres
a few micrometres
28
Which of these is not produced when a fuel undergoes complete combustion?
soot
carbon monoxide
carbon dioxide
water
29
Most polymers are ____________.
recyclable
biodegradable
nonbiodegradable
synthetic
30
What effect to emulsifiers have in a mixture of oil and water?
They help the oil and water to separate.
They don't have an effect.
They stop the oil and water separating out.
They make the mixture to taste better.
31
Which of these is not a layer of the Earth?
Crust
Mantle
Continental
Atmosphere
32
True or False? "Recycling metals is cheaper than mining and extracting them."
True
False
