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AQA GCSE C2 Chemistry (quiz 1) Flashcards | StudBud
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AQA GCSE C2 Chemistry (quiz 1)
AQA GCSE C2 Chemistry (quiz 1)
32 terms
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#aqa #additional #chemistry
Flashcards
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Answers
1
What is a reversible reaction?
One in which the products can react to produce more products
One in which the products can react to produce the reacants
2
Which of these is a disadvantage of using catalysts?
They can't be reused.
They slow down reactions too much.
They are often expensive to buy.
3
Thermosetting polymers have...
...weak intermolecular forces of attraction.
...tangled polymer chains.
...polymer chains with cross-links.
...low melting points.
4
What is the yield of a reaction?
The amount of product obtained in a reaction.
The amount of products produced in a reaction
The mass of reactants used in a reaction.
The temperature of a product.
5
True / False? Low and high density poly(ethene) are made using the same catalyst.
False
True
6
T/F: Isotopes of an element have the same atomic number, but different mass numbers.
True
False
7
The rate of a reaction depends on the...
...frequency of collisions.
...volume of solutions.
...location of the experiment.
8
Which of these uses an endothermic reaction?
photosynthesis
self-heating cans for drinks
hand warmers
sports injury packs
9
An ionic compound is made up of sodium and bromide ions. What is its formula?
NaBr2
Na2Br
NaBr
Na2Br2
10
If the relative atomic mass of H=1 and O=16, what is the relative formulae mass of H
2
O?
18
16
17
19
11
True or False? "H
+
ions are oxidised during the electrolysis of NaOH solution."
False
True
12
What is the problem with using acids and alkalis to make soluble salts?
It can be hard to tell when they've finished reacting.
Acids and alkalis don't react together.
Acids and alkalis explode when they're put together.
It requires a lot of equipment.
13
Sulphuric acid and aluminium react to produce...
...aluminium oxide and sulphur.
...aluminium oxide and hydrogen.
...aluminium sulphate and oxygen.
...aluminium sulphate and hydrogen
14
Fluorine is in Group 7 of the Periodic Table. What is the charge on a fluoride ion?
7+
7-
1+
1-
15
Which of these could you use to make the salt lead chloride?
lead nitrate and magnesium sulphate
lead nitrate and zinc sulphate
lead nitrate and sodium chloride
16
In electrolysis, the electrolyte must be...
...liquid.
...molten.
...solid.
...gas.
17
A reversible reaction takes in more energy in one direction than it gives out in the opposite.
False
True
18
Simple molecular substances have __________.
...strength
...high solubility in water.
...high electrical conductivity
... low boiling points
19
_______________ is used to manufacture aluminium from aluminium oxide.
Electrolysis
Electrochemistry
Electroplating
Electricity
20
What is the activation energy of a reaction?
The amount of energy used to start a reaction.
The amount of energy used to complete a reaction.
The maximum amt of energy needed by the particles to react.
The minimum amt of energy needed by the particles to react.
21
What is the overall charge on an ionic compound?
+1
-1
0
+2
22
True / False? "Gas chromatography can be linked to mass spectroscopy."
True
False
23
What is nitinol?
A thermosetting polymer
A thermosoftening polymer
A shape memory alloy
A nanoparticle
24
The rate of a reaction can be found using the amount of reactant used or...
...amount of product used over a period of time.
...amount of product formed over a period of time.
25
Giant covalent structures have...
...high melting points.
...low melting points.
...high solubility.
...moderate solubility.
26
True or False? "Pure metals are harder than alloys."
True
False
27
What type of bond is formed when two hydrogen atoms form a molecule?
giant covalent
metallic
ionic
covalent
28
T/F: Energy is always transferred to or from the surroundings during a chemical reaction.
False
True
29
True and False? "H
2
O is a giant ionic substance."
True
False
30
Which of these reactions would be fastest?
3cm magnesium strip with concentrated HCl
trhee 1cm magnesium strips with concentrated HCl
three 1cm magnesium strips with dilute HCl
3cm magnesium strip with dilute HCl
31
Why is cryolite used during the production of aluminium from its oxide by electrolysis?
It lowers the melting point of aluminium oxide.
It lowers the melting point of aluminium.
It increases the melting point of aluminium.
It increases the temperature.
32
True or False? "Oxidation reactions always involve oxygen."
False
True
