1
2
3
10
4
11
16
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5
12
17
6
13
18
7
14
19
8
15
9
1
A FUEL is
……
answer
A chemical that burns to
release heat energy
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2
COMBUSTION is …….
answer
•The reaction of a substance
with oxygen (oxidation) to give
out energy.
•Another name for burning
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3
What is the test for oxygen?
answer
Oxygen relights a
GLOWING taper
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4
What are the main components
of air?
answer
Air is about 20%
OXYGEN and
80% NITROGEN
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5
What is an EXOTHERMIC reaction?
answer
An exothermic reaction
that produces heat
energy
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6
What is a FINITE resource?
answer
A finite resource is
one which cannot be
replaced and will
eventually run out
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7
What is a FOSSIL FUEL?
answer
A fuel e.g. coal, crude
oil or natural gas,
formed from plant or
animal remains
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8
Describe how COAL was formed?
answer
•Ancient trees and plants
•Covered by layers of sediment
•High temperature
•High pressure
•Bacteria.
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9
Describe how GAS and CRUDE OIL
was formed?
answer
•Ancient marine creatures
•Covered by layers of sediment
•High temperature
•High pressure
•Bacteria.
.
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10
What are HYDROCARBONS?
answer
Hydrocarbons are
compounds of HYDROGEN
and CARBON only.
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11
What is CRUDE OIL?
answer
The mixture of
hydrocarbons as it
comes from the ground
or sea-bed.
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12
What is the test for water?
answer
Water boils at 1000C
and
freezes at 00C.
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13
What is the test for carbon
dioxide?
answer
Carbon dioxide turns lime
water milky.
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14
What happens when HYDROCARBONS are
burned in a plentiful supply of oxygen?
answer
Complete combustion:
form CARBON
DIOXIDE and WATER
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15
What happens when hydrocarbons are
burned in limited supply of air?
answer
Incomplete combustion
form carbon (soot), carbon
monoxide (a poisonous gas) and
water.
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16
Why is carbon monoxide dangerous?
answer
Carbon Monoxide (CO) is
poisonous.
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17
What type of reaction takes in energy?
answer
Endothermic
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18
Give the equation for complete combustion
of methane?
answer
Methane + Oxygen  Carbon
dioxide
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+ Water
19
Give the equation for incomplete
combustion of methane?
answer
Methane + Oxygen  Carbon + Carbon + Water
monoxide
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