5425938
Descripción
Test por Lilac Potato, actualizado hace más de 1 año
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Creado por Lilac Potato
hace casi 8 años
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Pregunta 1
Pregunta
Which of these can be found in the nucleus of an atom?
Respuesta
-
Proton
-
Electron
-
Neutron
Pregunta 2
Pregunta
Number of protons [blank_start]equals[blank_end] number of electrons
Respuesta
-
equals
Pregunta 3
Pregunta
Elements in the same group have...
Respuesta
-
the same number of electrons in their outer shell
-
similar properties
-
the same atomic number
-
the same number of shells
Pregunta 4
Pregunta
The mass number is the total number of [blank_start]protons[blank_end] and neutrons
Respuesta
-
protons
-
electrons
-
shells
Pregunta 5
Pregunta
What's the maximum number of electrons in the first shell?
Respuesta
-
2
-
8
-
4
-
1
Pregunta 6
Pregunta
An ionic bond is formed between 2 non-metals.
Respuesta
- True
- False
Pregunta 7
Pregunta
Covalent bonding involves [blank_start]sharing[blank_end] electrons.
Respuesta
-
sharing
Pregunta 8
Pregunta
Limestone thermally decomposes to produce ............ + carbon dioxide
Respuesta
-
calcium oxide
-
calcium hydroxide
-
water
-
limewater
Pregunta 9
Pregunta
Calcium carbonate reacts with acid to produce a calcium salt, [blank_start]carbon dioxide[blank_end] and water.
Respuesta
-
carbon dioxide
-
hydrogen
-
oxygen
Pregunta 10
Pregunta
Calcium oxide + water -----> ...........................?
Respuesta
-
Calcium hydroxide
-
Calcium carbonate
-
Limewater
Pregunta 11
Pregunta
Bubbling gas through limewater is the test for ..............?
Respuesta
-
carbon dioxide
-
hydrogen
-
limestone
Pregunta 12
Pregunta
Limestone can be used to make.....................?
Respuesta
-
cement
-
mortar
-
concrete
-
graphite
-
marble
Pregunta 13
Pregunta
What are some disadvantages of quarrying limestone?
Respuesta
-
Destroys habitats
-
Noise & dust pollution
-
Causes acid rain
-
It is cheap & quick
Pregunta 14
Pregunta
A metal ore is a rock which contains enough metal to make it worthwhile extracting metal from it
Respuesta
- True
- False
Pregunta 15
Pregunta
How will metals that are more reactive than carbon be extracted?
Respuesta
-
By electrolysis
-
By reduction with carbon
-
By smelting
-
By oxidation
Pregunta 16
Pregunta
Which of these can an electrolyte NOT be made of?
Respuesta
-
Metal salt solutions made from the ore
-
Molten metal oxides
-
Solid ore
Pregunta 17
Pregunta
In a solution of a dissolved metal compound, a more reactive metal with displace a less reactive metal as it bonds [blank_start]more[blank_end] strongly to the compound.
Respuesta
-
more
-
less
Pregunta 18
Pregunta
Which of these describes the bioleaching process?
Respuesta
-
Bacteria separate copper from copper sulphide, get energy from the bond between them, separating the copper and leaving a leachate with copper.
-
Plants are grown in soil that contains copper, copper builds up inside leaves, plants are harvested, dried & burned, copper is collected from ash in furnace
Pregunta 19
Pregunta
What are some positives of metal extraction?
Respuesta
-
Provides local people with jobs
-
Provides us with useful products
-
Doesn't pollute the environment
-
Doesn't permanently damage the environment
Pregunta 20
Pregunta
What are some properties of all metals?
Respuesta
-
Strong
-
Can be bent/shaped
-
Can conduct heat/electricity
-
Low density
-
Corrosion-resistant
Pregunta 21
Pregunta
Iron that has come straight from the blast furnace contains what percentage of iron?
Respuesta
-
96%
-
100%
-
93%
-
90%
Pregunta 22
Pregunta
Bronze is made of [blank_start]copper[blank_end] and tin.
Respuesta
-
copper
-
iron
-
chromium
Pregunta 23
Pregunta
Why can crude oil be separated into different fractions?
Respuesta
-
It is a mixture of hydrocarbons
-
It contains hydrocarbon compounds
-
It contains elements in their pure forms
Pregunta 24
Pregunta
A hydrocarbon can be tapped when it reaches its ................... ?
Respuesta
-
Boiling point
-
Melting point
Pregunta 25
Pregunta
Hydrocarbons (alkanes) are chains of carbon atoms surrounded by [blank_start]hydrogen[blank_end] atoms.
Respuesta
-
hydrogen
Pregunta 26
Pregunta
Which of the following are true? The shorter the molecule..........
(HINT: there are three!)
Respuesta
-
the less viscous it is
-
the more viscous it is
-
the more volatile it is
-
the less volatile it is
-
the more flammable it is
-
the less flammable it is
Pregunta 27
Pregunta
Why is crude oil a good fuel to use?
Respuesta
-
It burns cleanly
-
It is easier & cheaper
-
It is more reliable
-
It doesn't pollute
-
It is a renewable fuel
Pregunta 28
Pregunta
Which of these can be produced when burning a fossil fuel, other than carbon dioxide & water vapour?
Respuesta
-
Sulphur dioxide
-
Nitrogen oxides
-
Carbon monoxide
-
Hydrogen
-
Oxygen
Pregunta 29
Pregunta
Which of these fuels are 'carbon neutral'?
Respuesta
-
Ethanol (made by fermentation)
-
Biodiesel
-
Hydrogen gas
-
Ethanol (made by hydration)
Pregunta 30
Pregunta
Cracking involves passing a vaporised hydrocarbon over a powdered catalyst at a high temperature. Which of the following are true?
Respuesta
-
Aluminium oxide is the catalyst used
-
Nickel is the catalyst used
-
The temperature is about 400*C - 700*C
-
The temperature is about 900*C - 1200*C
Pregunta 31
Pregunta
Alkenes contain a carbon double bond which means that they are [blank_start]unsaturated[blank_end].
Respuesta
-
unsaturated
-
saturated
Pregunta 32
Pregunta
Which of these describes the fermentation process to produce ethanol?
Respuesta
-
sugar ----> ethanol + carbon dioxide
-
ethene + water vapour ----> ethanol
-
sugar ----> ethanol + water
Pregunta 33
Pregunta
The test for alkenes involves adding bromine water and, if an alkene is present, it will turn from colourless to brown.
Respuesta
- True
- False
Pregunta 34
Pregunta
What are the problems with the fermentation process?
Respuesta
-
It produces impure ethanol
-
It is a batch process
-
It is a continuous process
-
It uses a low temperature
Pregunta 35
Pregunta
Polymerisation involves joining together many monomers to form [blank_start]polymers[blank_end].
Respuesta
-
polymers
Pregunta 36
Pregunta
Which of these are uses of polymers?
Respuesta
-
Memory foam
-
Plastic bags
-
Car bodies
-
Sun cream
-
Wound dressings
-
Tooth fillings
Pregunta 37
Pregunta
Vegetable oils provide a lot of [blank_start]energy[blank_end].
Respuesta
-
energy
Pregunta 38
Pregunta
Why is it good that vegetable oils have high boiling points?
Respuesta
-
Foods can be cooked faster
-
Foods taste better
-
Foods are made healthier
Pregunta 39
Pregunta
[blank_start]Unsaturated[blank_end] oils contain a C=C double bond.
Respuesta
-
Unsaturated
-
Saturated
Pregunta 40
Pregunta
How can unsaturated oils be hardened?
Respuesta
-
React with hydrogen
-
React with water vapour
-
Nickel catalyst
-
Iron catalyst
-
60 degrees C
-
400 degrees C
Pregunta 41
Pregunta
Partially hydrogenated vegetable oils are much better for you than saturated fats.
Respuesta
- True
- False
Pregunta 42
Pregunta
Which of these are correct about emulsifiers?
Respuesta
-
Emulsifier molecules have a hydrophilic head that is attracted to water
-
Emulsifier molecules have a hydrophobic tail that is attracted to oil
-
Emulsifier molecules have a hydrophilic tail that is attracted to water
-
Emulsifier molecules have a hydrophobic head that is attracted to oil
Pregunta 43
Pregunta
What evidence did Wegener use to come up with his theory of Continental Drift?
Respuesta
-
Similar fossils found on opposite sides of the Atlantic Ocean
-
The idea of land bridges
-
The coastlines of Africa & S. America seeming to 'match'
-
Matching layers found in rocks in different continents
-
Measuring the movements of the continents
Pregunta 44
Pregunta
Wegener's theory of Continental Drift: 300 million years ago, there was one [blank_start]supercontinent[blank_end] (Pangaea) which broke into smaller continents which are still slowly drifting apart.
Respuesta
-
supercontinent
Pregunta 45
Pregunta
The mantle has all the properties of a [blank_start]solid[blank_end] but it can flow very slowly.
Respuesta
-
solid
Pregunta 46
Pregunta
Radioactive decay in the Earth's core releases [blank_start]heat[blank_end] energy which causes the mantle to flow in convection currents - moving the tectonic plates.
Respuesta
-
heat
Pregunta 47
Pregunta
Where did most of the carbon dioxide in the Earth's early atmosphere go?
Respuesta
-
Dissolved into the oceans
-
Absorbed by photosynthesis
-
'Locked up' in sedimentary rocks
Pregunta 48
Pregunta
What does the ozone layer do?
Respuesta
-
Blocks harmful rays from the Sun
-
Protect us from meteorites
-
Regulate our temperature
Pregunta 49
Pregunta
Miller-Urey experiment set up: Sealed [blank_start]nitrogen[blank_end], hydrogen, ammonia & methane into their apparatus & applied an electrical charge for a week.
Respuesta
-
nitrogen
Pregunta 50
Pregunta
Why is carbon dioxide removed before air is cooled to -200 degrees C in the fractional distillation of air?
Respuesta
-
It would freeze & block the pipes
-
It wouldn't condense
-
It must be distilled separately
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