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AQA GCSE Chemistry 9-1 paper 1 random Flashcards | StudBud
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AQA GCSE Chemistry 9-1 paper 1 random
AQA GCSE Chemistry 9-1 paper 1 random
20 terms
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#gcsescience #aqagcsescience #gcsechemistry #AQAgcseChemistry
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Answers
1
why is cryolite added to the electrolyte in the electrolysis of aluminium oxide?
to lower the melting point
to clean the equipment
to turn aluminium into a gas
to make it smell nice
2
Metals are good conductors of electricity because...
of the delocalised electrons.
the delocalised electrons carry charge through the metal.
the delocalated electrons carry charge through the metal.
of the delocated electrons.
3
which one is wrong?
neutron: charge 0 mass 0
electron: charge - mass negligible
proton: charge + mass 1
nucleus: charge +
4
transition elements:
all of the above
form ions with different charges
are useful as catalysts
form coloured compounds
5
this is...
an enbothermic reaction profile diagram
an exothermic reaction profile diagram
an ewothermic reaction profile diagram
an endothermic reaction profile diagram
6
punchline required
but all the good ones Argon
if I knew one
but there are none
7
the unit for concentration is
moles per dm3
moles per cm3
6.02 x 1023
moles
8
what type of chemical bond exists between hydrogen chloride gas?
friendship
covalent
ionic
metallic
9
relative formula mass (M
r
) of HCl is
36.5
37.5
100
40
10
what are the products of a metal carbonate + acid?
carbon dioxide + a salt
hydrogen + a salt
water + carbon dioxide + a salt
water + a salt
11
which of these does not affect the rate of reaction?
surface area
concentration
time
temperature
12
what happens when water boils?
the weak intermolecular forces are overcome.
the ionic bond between the atoms breaks.
WIF?
the covalent bonds between atoms break.
13
a nanometer in standard form is?
1 x 10 -10
1 x 10 -7
1 x 10 -8
1 x 10 -9
14
what is an acid?
sodium hydroxide
something that produced hydrogen ions in aqueous solution
something that produced hydroxide ions in aqueous solution
pH 7
15
balance this equation H
2
+ O
2
--> H
2
0
2H2 + 2O2 --> 2H20
2H2 + O2 --> 2H20
H2 + O2 --> H20
3H2 + O2 --> 3H20
16
The period number of an element is the same as the...
group number
number of electrons
number of neutrons
number of shells
17
what product is formed at the cathode when aqueous sodium chloride is electrolysed?
hydroxide
chlorine
sodium
hydrogen
18
what is the correct formula for sulfuric acid?
HSO3
H2SO4
HSO4
H2SO3
19
the is the electronic structure of which element?
oxygen
sulfur
neon
nitrogen
20
my favourite chemistry equation is:
c = n / v
v = n / c
n = c x v
c = n x v
