The Atmospehere – Exam...
Transcript of The Atmospehere – Exam...
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The
Atmosphere –
Exam questions
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2012 - Higher What substance is formed when carbon is
burned in oxygen?
Give the effect of this substance on moist
litmus paper.
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The table gives the % by volume of five
gases/ vapours found in our atmosphere.
Which two of these gases/ vapours are
produced when a fossil fuel is burned?
The amount of water vapour present in air
is the most variable. Suggest a reason for
this.
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Formula % Volume
N2 78.08
O2 20.95
H2O 0 to 4
Ar 0.93
CO2 0.036
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Describe an experiment, using a labelled
diagram in the box provided to show the
presence of carbon dioxide in air
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Give a test to show
that the droplets
formed on the outside
of a glass containing a
cold drink are water.
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2012 - Ordinary The diagram shows an arrangement of
apparatus suitable for the preparation of carbon dioxide gas in a school laboratory.
Name a suitable substance for liquid X and solid Y from which carbon dioxide can be made.
Limewater is used to test for the presence of carbon dioxide gas. What happens to limewater when carbon dioxide gas is bubbled through it?
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X
Y
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2011 - Higher
Complete the equation:
2HCl + CaCO3 →
Name a catalyst that you have used in
the school laboratory and give a reaction
that it catalyses.
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2011 – Ordinary
Name suitable
substances for
liquid X and solid Y
(catalyst) from
which oxygen can
be made.
X
Y
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2010 - Ordinary
liquid L
solid S
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Manganese
Dioxide
Hydrochloric
Acid
Hydrogen
Peroxide
Fire Extinguisher
Respiration
Combustion
• In the table write the letter
S opposite the name of the
solid used in the
preparation of oxygen.
• Write the letter L opposite
the name of the liquid
used in preparation of
oxygen.
• Write the letter U beside
two uses for oxygen gas.
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The diagram shows
magnesium being burned
in oxygen to form
magnesium oxide (MgO).
What effect does this
substance have on moist
litmus paper?
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2009 - Higher The apparatus shown in
the diagram was used to investigate the reaction of zinc with hydrochloric acid. Hydrogen gas is produced.
Describe a test for hydrogen.
Write a chemical equation for the reaction of zinc with hydrochloric acid.
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Name liquid A.
Name solid B.
What is a catalyst?
Carbon was burned in oxygen and the products tested with pieces of moist red and blue litmus paper. Give the result of the litmus test described above and make a conclusion based on this result.
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2009 – Ordinary The diagram shows an
arrangement of apparatus suitable for the preparation of carbon dioxide gas in a school laboratory.
Name suitable substances X and Y from which carbon dioxide can be made.
X
Y
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2008 - Higher
The liquid and solid
shown in the diagram
react together to
produce a gas that
turns limewater milky.
Name a liquid and a
solid that react
together in this way.
Names of specific
substances are
required.
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Magnesium was burned in oxygen as shown in the diagram.
What colour was the flame?
Pieces of moist blue and red litmus paper were mixed with the product of the combustion. What result was seen?
What conclusion can be made from the result of the litmus test?
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2008 - Ordinary Magnesium is burned in air. Magnesium
oxide is formed.
When magnesium oxide is tested with
moist red litmus indicator it changes
colour to blue.
What does this tell us about magnesium
oxide?
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Oxygen gas is one of the gases found in
clean air. Name any two other gases
normally found in clean air.
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2007 - Higher The diagram shows an apparatus that can be used for the
preparation and collection of carbon dioxide.
Give the formula of a suitable acid.
Give the chemical name for marble. (Note If you used some
substance other than marble to react with the acid to give carbon dioxide, then give the chemical name of that substance.)
What physical property of carbon dioxide allows the gas to be collected in the manner shown in the diagram?
If a strip of moist blue litmus paper and a strip of moist red litmus paper are put into a jar of carbon dioxide what effect, if any, does the gas have on them?
Give two uses of carbon dioxide.
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2007 - Ordinary
The diagram shows an arrangement of apparatus suitable for the preparation of carbon dioxide gas in a school laboratory.
Name suitable substances X and Y from which carbon dioxide can be made.
X
Y
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The diagram shows a gas
jar of carbon dioxide gas
being poured onto a
lighting candle. The candle
quenches (goes out).
This test demonstrates two
properties of carbon
dioxide gas.
State these two properties.
CO2
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2006 - Higher Name the two chemicals that
you reacted together to
prepare oxygen in the school
laboratory.
One of the chemicals acted as
a catalyst. Which one of the
two chemicals used was the
catalyst?
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Carbon dioxide turns
limewater milky.
Complete the chemical
equation for the
reaction of carbon
dioxide with limewater.
Ca(OH)2 + CO2 →
Marble chips
and acid
Limewater
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Experiment A
Gas syringe
containing
100 cm3 of air
Heat
Silica tube containing
copper powder
Experiment B
Graduated cylinder
Air
Water
100 cm3 80 cm3
Burning candle
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In Experiment A the air was pushed repeatedly over the heated copper powder and only 79 cm3of gas remained at the end of the experiment.
Why is it necessary to let the apparatus cool down before measuring the volume of the remaining gas?
Why did the volume of gas decrease and then remain steady?
What is the remaining gas mainly composed of?
Experiment B is less accurate than Experiment A. Give a reason why this is so.
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2006 - Ordinary The diagram shows a gas jar of
carbon dioxide gas being poured onto a lighting candle.
What happens to the lighting candle when the carbon dioxide gas is poured over it?
What does this tell us about
carbon dioxide gas?
Name the chemical that turns
milky white if carbon dioxide is bubbled through it.
CO2
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Oxygen gas can be prepared in a school laboratory using the apparatus drawn on the right.
Identify a liquid X and a solid Y that can be used in this preparation.
Solid Y speeds up the breakdown of liquid X.
What name is given to this type of chemical?
X
Y
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What happens when a
“glowing splint” (very
hot piece of wood) is
placed in a gas jar of
oxygen?
Give one property of
oxygen that this
demonstrates.