Ammonia Acid Worksheet With Answers Page 40

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M10.
(a)
(i)
fertilisers
for 1 mark
1
(ii)
7
for 1 mark
1
(iii)
5
for 1 mark
(ignore other units)
1
(b)
(i)
both nitrogen and hydrogen
for 1 mark
1
(ii)
two of:
nitrogen;
hydrogen/methane/natural gas;
oxygen/air;
water;
any fuel
(allow symbols, do not allow nitrogen oxides)
any two for 1 mark each
2
(c)
(i)
alkali/alkaline/base/basic
for 1 mark
1
(ii)
must be nitrate
for 1 mark
1
(iii)
thermometer or any other temperature measuring device
for 1 mark
1
[9]
M11.
(i)
a reaction in which the products can
be changed back to reactants
accept a reaction that can go forwards or backwards
1
under certain conditions
1
Page 40 of 49

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