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GCSE AQA Chemistry 2

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GCSE Chemistry (Chemistry 2) Quiz on GCSE AQA Chemistry 2, created by Lilac Potato on 29/11/2015.
Lilac Potato
Quiz by Lilac Potato, updated more than 1 year ago
Lilac Potato
Created by Lilac Potato about 9 years ago
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Resource summary

Question 1

Question
The mass number tells you the total number of protons and neutrons. Electron aren't counted in this number because their relative atomic mass is [blank_start]negligible[blank_end].
Answer
  • negligible
  • extremely large
  • negative

Question 2

Question
Which of these 2 statements describes a compound?
Answer
  • Compounds are two or more elements chemically bonded together
  • Compounds are two or more elements which are not chemically bonded together

Question 3

Question
Isotopes are different atomic forms of the same element which have the same number of neutrons but a different number of protons.
Answer
  • True
  • False

Question 4

Question
In ionic bonding, atoms lose or gain electrons to form charge particles (ions). Atoms from groups 1 and 2 are more likely to [blank_start]lose[blank_end] electrons.
Answer
  • lose
  • gain

Question 5

Question
Which of the following statements are true about ionic compounds?
Answer
  • They have giant ionic lattices
  • There are very strong electrostatic forces of attraction between oppositely charged ions
  • They have high melting and boiling points
  • They dissolve easily in water
  • They have small ionic lattices
  • There are very weak electrostatic forces of attraction between oppositely charged ions
  • They have low melting and boiling points
  • They don't dissolve easily in water

Question 6

Question
Covalent bonding involves sharing electrons to obtain full outer shells. These are strong bonds.
Answer
  • True
  • False

Question 7

Question
Which of these are features of simple molecular substances?
Answer
  • They have weak intermolecular forces
  • They have low melting and boiling points
  • They don't conduct electricity
  • They have strong intermolecular forces
  • Thy have high melting and boiling points
  • They conduct electricity

Question 8

Question
Graphite is the only non-metal which is a good conductor of heat and electricity. This is because each carbon atom has one [blank_start]delocalised electron[blank_end].
Answer
  • delocalised electron

Question 9

Question
Metals can be bent or shaped as the delocalised electrons allow the layers of atoms to slide over each other.
Answer
  • True
  • False

Question 10

Question
What size are nanoparticles?
Answer
  • 1-100 nm across
  • 100-1000 nm across
  • 0-1 nm across

Question 11

Question
Many new uses of nanoparticles are being developed: which of these can they be used for?
Answer
  • Catalysts
  • Sun cream and deodorants
  • Nanomedicine
  • Lubricant coatings
  • Electrical circuits
  • Hand warmers
  • Plastic bags
  • Making alloys

Question 12

Question
Thermosetting polymers have [blank_start]crosslinks[blank_end] which hold the chains together in a solid structure.
Answer
  • crosslinks

Question 13

Question
How do you work out number of moles?
Answer
  • mass/relative formula mass
  • relative formula mass/mass
  • relative formula mass * mass

Question 14

Question
Yields are always less than 100%, this may be because:
Answer
  • the reaction is reversible
  • when you filter a liquid to remove solid particles, you usually lose some of the liquid/solid
  • unexpected reactions happen
  • there are no reactants
  • you don't do the experiment in industrial conditions

Question 15

Question
Name two ways of identifying substances.
Answer
  • Paper Chromatography
  • Gas Chromatography
  • Solid Chromatography
  • Colour Chromatography

Question 16

Question
The rate of a reaction depends on four things: temperature, [blank_start]concentration[blank_end], catalyst and surface area.
Answer
  • concentration

Question 17

Question
Which of these methods of measuring the rate of a reaction is the most accurate?
Answer
  • Precipitation: observing a mark through the solution and measuring how long it takes for the mark to disappear
  • Change in mass: carry experiment out on a mass balance and observe how mass disappears (as gas is released)
  • Volume of gas given off: Use a gas syringe to measure volume of gas given off

Question 18

Question
The reaction between HCl acid and marble chips can be sped up by using finer particles of solid as it has a [blank_start]larger[blank_end] surface area.
Answer
  • larger
  • smaller

Question 19

Question
Higher temperature increases the number and energy of collisions which means it takes more time for the particles to have enough energy to start the reaction.
Answer
  • True
  • False

Question 20

Question
A [blank_start]catalyst[blank_end] is a substance which speeds up a reaction without being changed or used up in the reaction.
Answer
  • catalyst

Question 21

Question
Which of these are disadvantages of catalysts?
Answer
  • Very expensive to buy
  • Different reactions require different catalysts
  • Catalysts can be poisoned by impurities
  • They are harmful to people
  • They are very rare

Question 22

Question
Which of these are examples of exothermic reactions?
Answer
  • Combustion
  • Neutralisation reactions
  • Respiration
  • Sports injury packs
  • Photosynthesis

Question 23

Question
An alkali is a [blank_start]base[blank_end] that dissolves in water.
Answer
  • base

Question 24

Question
Acid + Metal ------> Salt + Oxygen
Answer
  • True
  • False

Question 25

Question
Ammonia + Nitric acid -------> [blank_start]Ammonium nitrate[blank_end]
Answer
  • Ammonium nitrate

Question 26

Question
Which of these are methods of making soluble salts?
Answer
  • Using a metal/insoluble base
  • Using an alkali
  • Precipitation reactions

Question 27

Question
An electrolyte contains free [blank_start]ions[blank_end] which conduct electricity.
Answer
  • ions
  • electrons
  • atoms

Question 28

Question
Oxidation is loss of electrons and reduction is gaining electrons.
Answer
  • True
  • False

Question 29

Question
In electrolysis, at the [blank_start]negative[blank_end] electrode, if metal and H+ ions are present, the metal ions will stay in solution is the metal is [blank_start]more[blank_end] reactive than hydrogen.
Answer
  • more
  • less
  • negative
  • postive

Question 30

Question
Uses of chlorine:
Answer
  • Bleach
  • Plastics
  • Plating metals

Question 31

Question
Cryolite is used to [blank_start]lower[blank_end] the temperature needed to melt aluminium oxide.
Answer
  • lower

Question 32

Question
In electroplating, you put the thing you want to plate at the positive electrode.
Answer
  • True
  • False
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