2051565
Descripción
Test por fletchere11, actualizado hace más de 1 año
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Creado por fletchere11
hace más de 9 años
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Pregunta 1
Pregunta
What are all substances made up of?
Respuesta
-
Atoms
-
Elements
-
Molecules
Pregunta 2
Pregunta
What is a substance made from only one type of atom?
Respuesta
-
Element
-
Mixture
-
Compound
Pregunta 3
Pregunta
The nucleus of an atom is made up of protons and neutrons
Respuesta
- True
- False
Pregunta 4
Pregunta
Electrons don't orbit the nucleus
Respuesta
- True
- False
Pregunta 5
Pregunta
What are the sub-atomic particles that make up atoms? [3]
Respuesta
-
Neutrons
-
Electrons
-
Protons
-
Molecules
-
Nucleus
-
Particles
Pregunta 6
Pregunta
Which is a description of Electrons?
Respuesta
-
Very very small and have hardly any mass
-
Very big and make up most of our atoms mass
Pregunta 7
Pregunta
Which one of these is correct?
Respuesta
-
Proton relative mass is 1 and its relative charge is +1 Neutron relative mass is 1 and its relative charge is 0 Electron relative mass is 1/2000 and its relative charge is -1
-
Proton relative mass is 0 and its relative charge is +2 Neutron relative mass is 1 and its relative charge is -1 Electron relative mass is 1/20 and its relative charge is 0
Pregunta 8
Pregunta
Atoms must have the same number of protons and electrons because they are neutral
Respuesta
- True
- False
Pregunta 9
Pregunta
If a neutral atom has 7 protons how many electrons must it have?
Respuesta
-
7
-
9
-
1
-
17
Pregunta 10
Pregunta
All atoms of a particular element are different
Respuesta
- True
- False
Pregunta 11
Pregunta
What is the mass number?
Respuesta
-
The number of protons and neutrons
-
The number of electrons
-
The number of protons and electrons
-
The number of protons, electrons and neutrons
Pregunta 12
Pregunta
The atomic number is the number of neutrons in an atom
Respuesta
- True
- False
Pregunta 13
Pregunta
What is the correct electron shell structure?
Respuesta
-
2, 8, 8, 8
-
1, 2, 3, 4
-
2, 4, 6 , 8
-
8, 8, 8, 2
Pregunta 14
Pregunta
What do chemical reactions show?
Respuesta
-
Reactants
-
Products of a reaction
-
Protons Neutrons and Electrons
-
The reactivity series
Pregunta 15
Pregunta
What do state symbols tell us?
Respuesta
-
State of reactants or products
-
Solids
-
Liquids
-
Gases
-
Aqueous
Pregunta 16
Pregunta
In a chemical reaction no atoms are created or destroyed they are just rearranged.
Respuesta
- True
- False
Pregunta 17
Pregunta
What do ionic bonds occur between
Respuesta
-
Metals
-
Non - Metals
-
Compounds
-
None of the Above
Pregunta 18
Pregunta
In ionic bonds metal atoms gain electrons and non - metal atoms lose electrons.
Respuesta
- True
- False
Pregunta 19
Pregunta
What is limestone?
Respuesta
-
A type of sedimentary rock composed mainly of calcium carbonate
-
A fossil
-
A stone made from limes
-
A lime in the shape of a stone
Pregunta 20
Pregunta
How long does it take to form limestone
Respuesta
-
Over millions of years
-
100 years
-
10 months
-
billions of years
Pregunta 21
Pregunta
Limestone is dug out of the ground and quarried, then made into blocks which can be used in building
Respuesta
- True
- False
Pregunta 22
Pregunta
Which is the test for Co2?
Respuesta
-
Heating CaCo3 and seeing if it turns limewater cloudy
-
Blowing bubbles into limewater
-
Adding calcium carbonate and limewater together to see if a reaction occurs
Pregunta 23
Pregunta
Limestone can be heated strongly to make it undergo a DECOMPOSITION REACTION. This means that a THERMAL DECOMPOSITION is used to break it down to form carbon dioxide and calcium oxide.
Respuesta
- True
- False
Pregunta 24
Pregunta
Limestone is used to test for carbon dioxide
Respuesta
- True
- False
Pregunta 25
Respuesta
-
The limestone cycle
-
The reaction of calcium hydroxide
-
a displacement reaction
Pregunta 26
Pregunta
What is heated together to make cement? [2]
Respuesta
-
Clay
-
Limestone
-
Water
-
Limewater
-
Cement
Pregunta 27
Pregunta
What do we mix together to make concrete? [4]
Respuesta
-
Sand
-
Water
-
Aggregate
-
Cement
-
Limewater
-
Corn flour
-
Stones/ Rocks
Pregunta 28
Pregunta
Which is not a property of metals?
Respuesta
-
Corrosive
-
Malleable
-
Ductile
-
Good electrical conductors
-
good conductors of heat
-
sonorous
-
shiny
Pregunta 29
Pregunta
Most metals have HIGH melting and boiling points and they are all SOLID at room temperature (EXCEPT MERCURY)
Respuesta
- True
- False
Pregunta 30
Pregunta
What is the rule that goes with displacement reactions?
Respuesta
-
If the metal added is more reactive than the metal in the solution then a displacement reaction will occur.
-
If the non-metal added is more reactive than the metal in the solution then a displacement reaction will occur.
-
If the metal added is more reactive than the non-metal in the solution then a displacement reaction will occur.
Pregunta 31
Pregunta
Metal powders and oxides can't be heated together to give a displacement reaction
Respuesta
- True
- False
Pregunta 32
Pregunta
Which is the method to extract copper from its ore?
Respuesta
-
Put copper carbonate and carbon in a test tube with cotton wool in the top and heat it.
-
Put copper oxide and carbon dioxide in a test tube and heat it.
Pregunta 33
Pregunta
What is the method for extracting copper called?
Respuesta
-
Reduction
-
Oxidisation
-
Decomposition
Pregunta 34
Pregunta
What decides how metals are extracted from there ores?
Respuesta
-
The reactivity series
-
Its atomic number
-
Where it is found
-
How much of it there is
Pregunta 35
Pregunta
Tick the true statements [4]
Respuesta
-
Metals above carbon in the reactivity series have to be extracted by electrolysis
-
Metals low in the reactivity series can be found native and just have to be purified
-
Metals near the bottom (e.g. copper) can be extracted through smelting
-
Metals in the middle of the reactivity series (below carbon) are extracted by chemical reduction
-
Metals in the middle of the reactivity series (below carbon) cant be extracted
-
Metals at the top of the reactivity series are highly dangerous and poisonous
Pregunta 36
Pregunta
What is bioleaching?
Respuesta
-
When bacteria feed on low-grade metal ores
-
When bacteria leach onto things
-
Clingy bacteria
Pregunta 37
Pregunta
What are alloys ?
Respuesta
-
Pure metals mixed with other elements to make them stronger
-
non-metals
-
elements
Pregunta 38
Pregunta
Why is crude oil not useful
Respuesta
-
Because it is a mixture of many different compounds
-
Too runny
-
Tastes bad
Pregunta 39
Pregunta
Most of the compounds in crude oil are hydrocarbons
Respuesta
- True
- False
Pregunta 40
Pregunta
We make crude oil useful by doing fractional distillation
Respuesta
- True
- False
Pregunta 41
Pregunta
What are substances that are produced by hydrocarbons reacting with oxygen?
Respuesta
-
Carbon dioxide
-
Water
-
Carbon monoxide
-
Oxygen
Pregunta 42
Pregunta
What is carbon dioxide (the main greenhouse gas in the air) causing according to scientists?
Respuesta
-
Global warming
-
Global dimming
-
Food shortness
Pregunta 43
Pregunta
What are particulates made of?
Respuesta
-
Carbon (soot) and unburnt hydrocarbons
-
Calcium
-
Carbon dioxide
Pregunta 44
Pregunta
How do particulates cause global dimming?
Respuesta
-
They travel into the upper atmosphere, reflecting sunlight back into space.
-
They engulf all the light
-
They dont
Pregunta 45
Pregunta
What does a catalyst converter do?
Respuesta
-
Greatly reduces the carbon monoxide and nitrogen oxide produced by a car engine.
-
Converts things into a catalyst
-
Converts carbon dioxide into oxygen
Pregunta 46
Pregunta
What is crude oil separated into in fractional distillation?
Respuesta
-
Groups of compounds with similar properties
-
Elements
-
Atoms
Pregunta 47
Pregunta
what does the crude oil enter the fractionating column as ?
Respuesta
-
Solid
-
Liquid
-
Gas
Pregunta 48
Pregunta
Which of these are true?
Respuesta
-
Gases at the top have short chains (1-4 carbons)
-
Gases at the bottom have long chains (100+ carbons)
-
Gases at the bottom have short chains (less than 10 carbons)
-
Gases at the top have long chains (20+ carbons)
Pregunta 49
Pregunta
The compounds condense when the temperatures inside the fractionating column matches there boiling point.
Respuesta
- True
- False
Pregunta 50
Pregunta
What are Alkanes and Alkenes?
Respuesta
-
Hydrocarbons
-
Gases
-
They don't exist
Pregunta 51
Pregunta
What does the first part of the name show?
Respuesta
-
The number of carbon atoms in the molecule
-
The number of hydrogen atoms in the molecule
-
Whether it is and alkane or and alkene
Pregunta 52
Pregunta
Alkanes have a single bon and are saturated
Respuesta
- True
- False
Pregunta 53
Pregunta
Alkenes have a double bond and are unsaturated
Respuesta
- True
- False
Pregunta 54
Pregunta
Which is the formula for Alkanes?
Respuesta
-
C2H2n+2
-
C2H2n
-
C3H4n
Pregunta 55
Pregunta
Which is the formula for Alkenes?
Respuesta
-
C2H2n
-
C2H2n+2
-
C4H3n+1
Pregunta 56
Pregunta
Thick = Viscous
Respuesta
- True
- False
Pregunta 57
Pregunta
What are polymers?
Respuesta
-
Compounds made when lots of alkene molecules join together
-
Mixtures of alkenes and alkanes
-
The same as monomers
Pregunta 58
Pregunta
What is it called when a long chain hydrocarbon is 'cracked' into smaller pieces?
Respuesta
-
Thermal decomposition
-
Oxidisation
-
Exothermic reaction
Pregunta 59
Pregunta
What is the bromine water test for?
Respuesta
-
To tell the difference between alkanes and alkenes
-
To split hydrocarbons
-
To make a polymer
Pregunta 60
Pregunta
What colour do alkenes go with orange bromine water?
Respuesta
-
Colourless
-
Brown
-
Orange
-
Red
Pregunta 61
Pregunta
What colour do alkanes go in bromine water?
Respuesta
-
Stay Orange
-
Purple
-
Pink
-
Green
Pregunta 62
Pregunta
What do smart polymers such as memory polymers do?
Respuesta
-
Change there shape when they are hot or cold
-
Remember information
-
React to light
Pregunta 63
Pregunta
What can Ethanol be made by?
Respuesta
-
Fermentation
-
Exothermic reaction
-
Distillation
Pregunta 64
Pregunta
Ethanol produced by fermentation is a biofuel.
Respuesta
- True
- False
Pregunta 65
Pregunta
What do all vegetable oils contain?
Respuesta
-
Long chain carbons and hydrogen's
-
Short chain carbons and hydrogen's
-
Long and short chain carbons
Pregunta 66
Pregunta
What state are unsaturated oils at room temperature?
Respuesta
-
Liquid
-
Solid
-
Gas
Pregunta 67
Pregunta
To harden vegetable oils we react them with H2 and use a nickel catalyst at 60 oC.
Respuesta
- True
- False
Pregunta 68
Pregunta
What are hardened vegetable oils sometimes called
Respuesta
-
Hydrogenated oils
-
Exothermically hardened oils
-
Oxygenised oils
Pregunta 69
Pregunta
What are the 2 main ways to extract plant oils?
Respuesta
-
Pressing
-
Steam distillation
-
Hydrogenation
-
Oxygenation
Pregunta 70
Pregunta
What is an emulsion?
Respuesta
-
A mixture of liquids that do not dissolve in each other
-
A mixture of two substances that are dissolved in each other
-
Something that stops a substance separating
Pregunta 71
Pregunta
What is an emulsifier?
Respuesta
-
Something that helps keeps emulsions mixed together
-
A mixture of oil and water
-
A mixture of emulsions
Pregunta 72
Pregunta
How long has our atmosphere been 'stable'?
Respuesta
-
About 200 million years
-
About 100 years
-
1 million years
Pregunta 73
Pregunta
How much nitrogen is in the air?
Respuesta
-
78%
-
65%
-
21%
-
14%
Pregunta 74
Pregunta
How much argon is in the atmosphere?
Respuesta
-
0.9%
-
10%
-
82%
-
0.4%
Pregunta 75
Pregunta
How much carbon dioxide is in the atmosphere?
Respuesta
-
0.04%
-
0.9%
-
26%
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