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