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