The Atmosphere

What is the approximate percentage composition of carbon dioxide in the atmosphere?
1. < 1%
2. 0%
3. 21%
4. 78%
What is the correct chemical formula for carbon dioxide?
1. CO₂
2. C₂O
3. CaO
4. CO
Which of the following words are missing from the sentence below?"
Carbon dioxide is produced by ____________ and used up in ___________________.
1. respiration and photosynthesis respectively.
2. photosynthesis and respiration respectively.
3. transpiration and photosynthesis respectively.
4. fluoridation and photosynthesis respectively.
Which one of the following word equations is correct?
1. calcium carbonate + hydrochloric acid → calcium chloride + carbon dioxide + water
2. calcium carbonate + hydrochloric acid → carbon dioxide + water
3. calcium carbonate + hydrochloric acid → calcium chloride + carbon dioxide
4. calcium carbonate + hydrochloric acid → calcium chloride + water
Which one of the following equations is correctly balanced?
1. CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
2. CaCO₃ + HCl → CaCl₂ + H₂O
3. CaCO₃ + 2HCl → CaCl₂ + CO₂
4. CaCO₃ + HCl → CaCl₂ + 2H₂O
In the apparatus shown for preparing oxygen gas, name the chemical A and the piece of apparatus B.
1. A = hydrogen peroxide and B = gas jar
2. A = hydrogen peroxide and B = flask
3. A = hydrochloric acid and B = trough
4. hydrochloric acid and B = gas jar
Which of the following combinations best describes the percentage composition of the main gases in our atmosphere?
1. 78% nitrogen, 21% oxygen and 1% the remainder of gases.
2. 78% nitrogen, 15% oxygen and 6% carbon dioxide.
3. 78% oxygen, 21% nitrogen and 1% the remainder of gases.
4. 78% oxygen, 21% carbon dioxide and 1% the remainder nitrogen.
Which one of the following is NOT a physical property of carbon dioxide gas?
1. Turns limewater milky white
2. Colourless
3. Odourless
4. Heavier than air
Which one of the following is the confirmatory test for carbon dioxide gas?
1. It turns limewater from colourless to milky white.
2. It burns with a pop.
3. It burns in air with a blue flame.
4. It supports combustion.
Which one of the following substances is completely different in composition from the other three?
1. Carbon dioxide
2. Marble
3. Calcium carbonate
4. Limestone
Complete the following word equation for the reaction that takes place when carbon dioxide is bubbled through limewater.
Limewater + carbon dioxide gives:
1. calcium carbonate + water
2. carbon dioxide + water
3. calcium carbonate + carbon dioxide
4. calcium + water
The diagram shows carbon dioxide gas being poured from one gas jar into another. This demonstrates that:
1. carbon dioxide is heavier than air
2. carbon dioxide is lighter than air
3. carbon dioxide has the same density as air
4. carbon dioxide does not burn in air
If carbon dioxide gas is bubbled through water and the resulting solution tested with both red and blue litmus paper, which one of the following is most likely to occur?
1. The blue litmus paper turns red.
2. There is no change in colour of either litmus papers.
3. The red litmus paper turns blue.
4. The red litmus paper changes colour to blue, while the blue litmus paper turns red.
Carbon dioxide dissolves slightly in water to form an acidic solution. This solution is known as:
1. carbonic acid
2. hydrochloric acid
3. citric acid
4. sulfuric acid
Which one of the following is NOT a use of carbon dioxide?
1. It is bubbled through fish tanks
2. Fire extinguishers
3. Special effects on stage
4. Fizzy drinks
Which one of the following statements is FALSE with reference to dry ice?
1. It is bubbled through fish tanks
2. It is used in some fire extinguishers
3. It is used in special effects on stage
4. It changes into a solid at -78 degrees Celsius.
Carbon dioxide gas is prepared in the laboratory using:
1. marble chips and dilute hydrochloric acid
2. calcium chloride and dilute hydrochloric acid
3. marble chips and carbonic acid
4. calcium carbonate and water
Which one of the following chemicals is used to test for carbon dioxide?
1. limewater
2. limescale
3. limesoda
4. calcium carbonate
What is observed when dilute hydrochloric acid is added to calcium carbonate?
1. The mixture fizzes.
2. The mixture turns black.
3. Nothing happens.
4. The mixture reacts explosively with a burning flame.
What happens when a lighted splint is placed in a test-tube containing carbon-dioxide gas?
1. The lighted splint goes out.
2. The lighted splint bursts into flames.
3. A loud pop is heard.
4. The lighted splint burns with a blue flame.
Dry ice is used to make the smoke effect seen on stage. "Smoke" from dry ice on a stage falls to the ground because:
1. carbon dioxide gas is heavier than air
2. carbon dioxide does not mix with air
3. dry ice reacts vigorously with air
4. dry ice is a form of carbon dioxide
Calcium carbonate is one of the major components of:
1. chalk
2. lipstick
3. table salt
4. vinegar
Steel wool is placed in a test-tube which is then inverted in a beaker of water as shown. After a week or so, the level of water in the test tube rises. What does this experiment demonstrate?
1. That water is necessary for rusting.
2. That carbon dioxide is necessary for rusting.
3. That the air contains nitrogen.
4. That there is carbon dioxide in the air.
A substance that alters the rate of a chemical reaction, but does not get used up in the reaction is known as:
1. a catalyst
2. a catholic
3. a catalytic converter
4. a pollutant
Complete the following word equation:
1. oxygen + water
2. carbon dioxide + water
3. hydrogen + water
4. hydrogen + carbon dioxide
Which one of the following chemical equations is balanced?
Name the pieces of apparatus labelled A and B in the diagram.
1. A = tap funnel, B = trough.
2. A = delivery tube, B = trough.
3. A = tap funnel, B = beehive shelf.
4. A = gas jar, B = trough.
A glowing splint is placed in a test-tube of oxygen gas as shown in the diagram. Which of the following is most likely to occur?
1. The glowing splint will rekindle (relight).
2. The glowing splint will become extinguished.
3. The glowing splint will ignite with a pop.
4. No change occurs to the glowing splint.
Hot charcoal (carbon) is burned in oxygen as shown in the diagram. Name the instrument labelled X.
1. Combustion spoon
2. Wooden spoon
3. Gas jar
4. Tongs
When charcoal burns in oxygen, which of the following gases is mainly produced?
1. carbon dioxide
2. carbon monoxide
3. water vapour
4. nitrogen gas
Which one of the following equations is correct for the burning of magnesium in air?
1. magnesium + oxygen ➞ magnesium oxide
2. magnesium + air ➞ magnesium oxide
3. magnesium + carbon dioxide ➞ magnesium dioxide + carbon
4. magnesium oxide ➞ magnesium + oxygen
The burning of a fuel in oxygen is commonly known as
1. combustion
2. filtration
3. evaporation
4. sublimation
Nitrogen gas changes into a liquid at a temperature of
1. -196 ºCelsius
2. 100 ºCelsius
3. 0 ºCelsius
4. 15 ºCelsius
Which one of the following gases is used up when magnesium burns in air?
1. Oxygen
2. Carbon dioxide
3. Nitrogen
4. Water vapour
Which one of the following is NOT a property of oxygen?
1. Poisonous gas
2. Colourless gas
3. Slightly soluble in water
4. Supports combustion
Which one of the following gases is the LEAST abundant in our atmosphere?
1. Natural gas
2. Oxygen gas
3. Carbon dioxide
4. Nitrogen gas
Which of the following pairs of scientists are credited with the discovery of oxygen in the 1700s?
1. Lavoisier & Priestley
2. Watson & Crick
3. Einstein & Hawking
4. Pierre & Marie Curie
Which noble gas is present in light bulbs so as to prevent the filament from burning and melting?
1. Argon
2. Nitrogen
3. Krypton
4. Helium
Which one of the following gases is present in our atmosphere as a major pollutant?
1. Sulfur dioxide
2. Nitrogen
3. Hydrogen
4. Oxygen
Manganese dioxide is a catalyst used in the preparation of oxygen gas. Which one of the following best describes manganese dioxide?
1. Fine black powder
2. Blue crystals
3. Yellow powder
4. Shiny metallic granules
Approximately how much of the air is composed of oxygen?
1. One fifth
2. Four fifths
3. One tenth
4. One quarter
When carbon is burned in oxygen, the product formed is dissolved in water and then tested with both red and blue litmus papers. Which of the following is most likely to happen?
1. The blue litmus paper turns red.
2. The red litmus paper turns blue.
3. There is no colour change in both litmus papers.
4. Both litmus papers change colour.
Which one of the following is not part of the fire triangle?
1. Carbon dioxide
2. Oxygen
3. Heat
4. Fuel
Which one of the following chemicals is not used in the preparation of carbon dioxide gas?
1. Hydrogen peroxide
2. Hydrochloric acid
3. Calcium carbonate
4. Marble chips
Carbon dioxide is soluble in water
1. TRUE
2. FALSE
Which one of the following pieces of apparatus would you not use when preparing carbon dioxide gas?
1. Basin/trough
2. Gas jar
3. Funnel
4. Cardboard cover
Another name for calcium carbonate is
1. marble chips
2. limescale
3. calcium chloride
4. lime
Carbon dioxide is not used
1. in hot air balloons
2. in fire extinguishers
3. in fizzy drinks
4. in photosynthesis
Which one of the following chemicals is not used in the preparation of oxygen gas?
1. Hydrochloric acid
2. Manganese dioxide
3. Hydrogen peroxide
Oxygen gas is prepared in the laboratory, and collected by displacing water.
This method of collection implies that
1. oxygen is almost completely insoluble in water
2. oxygen reacts with water
3. oxygen is denser than air
4. oxygen is less dense than water
What is the purpose of manganese dioxide in the preparation of oxygen?
1. It acts as a catalyst.
2. It reacts with the hydrogen peroxide.
3. It removes impurities from the products.
4. It purifies the reactants.
When preparing and collecting oxygen gas, the first couple of jars are discarded because
1. they contain air mixed with the oxygen
2. there is nothing in the jars
3. they contain some hydrogen peroxide
4. some water may be present in the jars
A test for one of the gases on your course is that it will relight a glowing wooden splint.
Which gas is this?
1. Oxygen
2. Carbon dioxide
3. Hydrogen
4. Methane
Which metal, when burned in oxygen gas, will produce a very bright flame?
1. Magnesium
2. Copper
3. Zinc
4. Gold
Carbon dioxide is produced when __________ is burned in oxygen.
1. carbon
2. carbonic acid
3. carbon monoxide
4. calcium carbonate
The percentage composition of oxygen in air is approximately
1. 20%
2. 2%
3. 25%
4. 15%
Oxygen is produced by plants when they undergo
1. photosynthesis
2. respiration
3. conservation
4. evolution
The chemical formula for ozone is
1. O₃
2. O₂
3. O
4. Oz
The ozone layer lies between 20 and 30 kilometres above the surface of the earth. What does this layer protect us from?
1. Ultra violet radiation
2. Infra red radiation
3. Cosmic rays
4. Electromagnetic radiation
CFCs are no longer used because they can cause damage to the ozone layer.
Where were CFCs to be found?
1. Aerosol sprays
2. Paint
3. Petrol
4. Fertilizers
When hydrochloric acid reacts with magnesium, a gas is produced.
What gas is this?
1. Hydrogen
2. Helium
3. Oxygen
4. Carbon dioxide
Which of these gases is much less denser than air?
1. Hydrogen
2. Oxygen
3. Carbon dioxide
4. Nitrogen
The test for hydrogen is that it
1. burns with a loud pop
2. turns limewater milky
3. rekindles a glowing splint
4. extinguishes a glowing splint
This gas dissolves in water to form an acidic solution. What is it?
1. Carbon dioxide
2. Hydrogen
3. Oxygen
4. Methane
This gas is denser than air and used in fire extinguishers. What is it?
1. Carbon dioxide
2. Hydrogen
3. Oxygen
4. Methane
This gas is the most abundant in the air around us. What is it?
1. Nitrogen
2. Oxygen
3. Hydrogen
4. Helium
The amount of catalyst used in a reaction does not affect the rate of the reaction.
1. FALSE
2. TRUE
Hydrogen, oxygen and carbon dioxide gases are all colourless and they each have the same density.
1. FALSE
2. TRUE

The Atmosphere

Multiple Choice Quiz