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Quiz von I M Wilson, aktualisiert more than 1 year ago
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Erstellt von I M Wilson
vor etwa 9 Jahre
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Frage 1
Frage
Select the substances which are giant 3D molecules
Antworten
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Diamond
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Sillicon Dioxide
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Graphite
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Graphene
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Coal
Frage 2
Frage
Plastics all have the same properties because they are all made by polymerisation.
Antworten
- True
- False
Frage 3
Frage
How big is a human hair?
Antworten
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80000nm
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80000mm
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8000nm
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8000mm
Frage 4
Frage
Complete the formula for Magnesium Carbonate
Mg
Antworten
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CO2
-
CO3
-
CO
Frage 5
Frage
NH4+ is more commonly known as...
Antworten
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Ammonia
-
Ammonium
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Nitro-tetra-hydride
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Hydrogen-nitride
Frage 6
Frage
Gas chromatography can be used to identify gases.
Antworten
- True
- False
Frage 7
Frage
The electronic structure of chlorine is...
Antworten
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2,8,8,7
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2,7
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2,8,7
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4,4,4,4,1
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8,8,1
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2,4,4,4,3
Frage 8
Frage
What is a mole?
Antworten
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A specific mass of an element.
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A specific number of particles.
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The number of different molecules in an equation.
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A small furry blind rodent.
Frage 9
Frage
Covalent bonds contain shared pairs of electrons.
Antworten
- True
- False
Frage 10
Frage
In electrolysis, the cation is...
Antworten
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The most reactive ion.
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The positive ion.
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The highest powered electrode.
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The positive electrode.
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The negative ion.
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The negative electrode.
Frage 11
Frage
What name do we give to a substance that can be separated using electricity?
Antworten
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Electrolysis.
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Electrolyte.
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Salt
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Electronegative
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Solution
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Liquid
Frage 12
Frage
The raw material that is shipped in to extract aluminium is...
Antworten
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Bauxite
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Alumina
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Aluminum
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Cryolyte
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Aluminium Oxide
Frage 13
Frage
What does a half equation tell you?
Antworten
-
The loss or gain of electrons from one half of the equation.
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The loss or gain of electrons from one specific molecule.
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The movement of electrons from one ionic molecule to another (This will change the charge of the ion.
Frage 14
Frage
An anode is...
Antworten
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A negative ion
-
A negative electrode
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A positive ion
-
A positive electrode
Frage 15
Frage
Oxidation is _________ reduction is _________ of electrons.
Antworten
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loss, gain
-
gain, loss
Frage 16
Frage
Acids contain H+ ions which is why we measure how strong they are using the pH scale (H stands for hydrogen).
Antworten
- True
- False
Frage 17
Frage
An insoluble salt formed from two liquids is known as a precipitate.
Antworten
- True
- False
Frage 18
Frage
Burning coal is an endothermic reaction because you have to give it energy from a flame (match/lighter) to get it to start.
Antworten
- True
- False
Frage 19
Frage
Why is a mass spectrometer under vacuum conditions?
Antworten
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To reduce mass.
-
To reduce friction.
-
To reduce interference from air particles.
Frage 20
Frage
What is the correct half equation for the hydrogen in the neutralisation of sulphuric acid using calcium carbonate?
H2SO4 + CaCO3 --> H2O + CaSO4 + CO2
Antworten
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H+ + e- --> H
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H --> H+ + e-
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2H+ + e- --> 2H
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2H+ + 2e- --> 2H
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H+2 + 2e- --> 2H+
Frage 21
Frage
Select all of the things that can affect the rate of reaction.
Antworten
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Temperature
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Mass
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Concentration
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Volume
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Surface Area
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Pressure
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Force
Frage 22
Frage
The empirical formula is the same as the molecular formula.
Antworten
- True
- False
Frage 23
Frage
What is the theoretical yield?
Antworten
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The answer you think you will get.
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The mass of product you make.
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The mass of product you should make according to the calculations.
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The volume of gas made by a similar reaction.
Frage 24
Frage
What is the catalyst used in the Haber Process?
Antworten
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Nickel
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Platinum
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Iron
Frage 25
Frage
What does rate of reaction mean?
Antworten
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How quickly the reaction happens.
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How efficient the reaction is.
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The frequency of successful collisions.
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The intensity of the gas released.
Frage 26
Frage
How do you work out percentage yield?
Antworten
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(actual/theoretical) x100
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(theoretical/actual) x100
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(actual/theoretical) /100
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(theoretical/actual) /100
Frage 27
Frage
Select the exothermic reaction(s)
Antworten
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Ammonium nitrate + Water
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Acid + Alkali
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CaCO3 (+heat)
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Magnesium + Hydrochloric acid
Frage 28
Frage
What does Mr stand for?
Antworten
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Relative molecular mass
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Molecular formula
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Mass
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Mister
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