2711100
Descripción
Test por I M Wilson, actualizado hace más de 1 año
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Creado por I M Wilson
hace alrededor de 9 años
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Pregunta 1
Pregunta
Select the substances which are giant 3D molecules
Respuesta
-
Diamond
-
Sillicon Dioxide
-
Graphite
-
Graphene
-
Coal
Pregunta 2
Pregunta
Plastics all have the same properties because they are all made by polymerisation.
Respuesta
- True
- False
Pregunta 3
Pregunta
How big is a human hair?
Respuesta
-
80000nm
-
80000mm
-
8000nm
-
8000mm
Pregunta 4
Pregunta
Complete the formula for Magnesium Carbonate
Mg
Respuesta
-
CO2
-
CO3
-
CO
Pregunta 5
Pregunta
NH4+ is more commonly known as...
Respuesta
-
Ammonia
-
Ammonium
-
Nitro-tetra-hydride
-
Hydrogen-nitride
Pregunta 6
Pregunta
Gas chromatography can be used to identify gases.
Respuesta
- True
- False
Pregunta 7
Pregunta
The electronic structure of chlorine is...
Respuesta
-
2,8,8,7
-
2,7
-
2,8,7
-
4,4,4,4,1
-
8,8,1
-
2,4,4,4,3
Pregunta 8
Pregunta
What is a mole?
Respuesta
-
A specific mass of an element.
-
A specific number of particles.
-
The number of different molecules in an equation.
-
A small furry blind rodent.
Pregunta 9
Pregunta
Covalent bonds contain shared pairs of electrons.
Respuesta
- True
- False
Pregunta 10
Pregunta
In electrolysis, the cation is...
Respuesta
-
The most reactive ion.
-
The positive ion.
-
The highest powered electrode.
-
The positive electrode.
-
The negative ion.
-
The negative electrode.
Pregunta 11
Pregunta
What name do we give to a substance that can be separated using electricity?
Respuesta
-
Electrolysis.
-
Electrolyte.
-
Salt
-
Electronegative
-
Solution
-
Liquid
Pregunta 12
Pregunta
The raw material that is shipped in to extract aluminium is...
Respuesta
-
Bauxite
-
Alumina
-
Aluminum
-
Cryolyte
-
Aluminium Oxide
Pregunta 13
Pregunta
What does a half equation tell you?
Respuesta
-
The loss or gain of electrons from one half of the equation.
-
The loss or gain of electrons from one specific molecule.
-
The movement of electrons from one ionic molecule to another (This will change the charge of the ion.
Pregunta 14
Pregunta
An anode is...
Respuesta
-
A negative ion
-
A negative electrode
-
A positive ion
-
A positive electrode
Pregunta 15
Pregunta
Oxidation is _________ reduction is _________ of electrons.
Respuesta
-
loss, gain
-
gain, loss
Pregunta 16
Pregunta
Acids contain H+ ions which is why we measure how strong they are using the pH scale (H stands for hydrogen).
Respuesta
- True
- False
Pregunta 17
Pregunta
An insoluble salt formed from two liquids is known as a precipitate.
Respuesta
- True
- False
Pregunta 18
Pregunta
Burning coal is an endothermic reaction because you have to give it energy from a flame (match/lighter) to get it to start.
Respuesta
- True
- False
Pregunta 19
Pregunta
Why is a mass spectrometer under vacuum conditions?
Respuesta
-
To reduce mass.
-
To reduce friction.
-
To reduce interference from air particles.
Pregunta 20
Pregunta
What is the correct half equation for the hydrogen in the neutralisation of sulphuric acid using calcium carbonate?
H2SO4 + CaCO3 --> H2O + CaSO4 + CO2
Respuesta
-
H+ + e- --> H
-
H --> H+ + e-
-
2H+ + e- --> 2H
-
2H+ + 2e- --> 2H
-
H+2 + 2e- --> 2H+
Pregunta 21
Pregunta
Select all of the things that can affect the rate of reaction.
Respuesta
-
Temperature
-
Mass
-
Concentration
-
Volume
-
Surface Area
-
Pressure
-
Force
Pregunta 22
Pregunta
The empirical formula is the same as the molecular formula.
Respuesta
- True
- False
Pregunta 23
Pregunta
What is the theoretical yield?
Respuesta
-
The answer you think you will get.
-
The mass of product you make.
-
The mass of product you should make according to the calculations.
-
The volume of gas made by a similar reaction.
Pregunta 24
Pregunta
What is the catalyst used in the Haber Process?
Respuesta
-
Nickel
-
Platinum
-
Iron
Pregunta 25
Pregunta
What does rate of reaction mean?
Respuesta
-
How quickly the reaction happens.
-
How efficient the reaction is.
-
The frequency of successful collisions.
-
The intensity of the gas released.
Pregunta 26
Pregunta
How do you work out percentage yield?
Respuesta
-
(actual/theoretical) x100
-
(theoretical/actual) x100
-
(actual/theoretical) /100
-
(theoretical/actual) /100
Pregunta 27
Pregunta
Select the exothermic reaction(s)
Respuesta
-
Ammonium nitrate + Water
-
Acid + Alkali
-
CaCO3 (+heat)
-
Magnesium + Hydrochloric acid
Pregunta 28
Pregunta
What does Mr stand for?
Respuesta
-
Relative molecular mass
-
Molecular formula
-
Mass
-
Mister
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