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Chemistry GCSE revision

Description

tests for gases, producing gases, test for anions and cations, flame tests, percentage of gases, CO2 and climate change, combustion
Scarlett Taylor
Quiz by Scarlett Taylor, updated more than 1 year ago
Scarlett Taylor
Created by Scarlett Taylor over 9 years ago
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Resource summary

Question 1

Question
Which two tests show a positive test for water?
Answer
  • Add to anhydrous copper sulphate(II) and white powder turns blue
  • Add to anhydrous cobalt(II) chloride and it turns from pink to blue
  • Add to anhydrous cobalt(II) chloride and it turns from blue to pink
  • Add to anhydrous copper sulphate(II) and blue powder turns white

Question 2

Question
Aluminium and lead both produce white precipitate when ammonia is added and when sodium hydroxide is added. To distinguish you can look at the flame tests which shows aluminium as a blue flame.
Answer
  • True
  • False

Question 3

Question
If you add dilute sulphuric acid to a solution of calcium it will produce a white pecipitate
Answer
  • True
  • False

Question 4

Question
What are the tests to identify gases in this order: oxygen, hydrogen, carbon dioxide.
Answer
  • Pass through lime water turning it cloudy if present, Put a lighted splint into a sample burns with a popping noise, Put a glowing splint into the sample and the splint relights.
  • Put a glowing splint into the sample and the splint relights, Put a lighted splint into a sample burns with a popping noise, Pass through lime water turning it cloudy if present.
  • Put a glowing splint into the sample and the splint relights, Pass through lime water turning it cloudy if present, Put a lighted splint into a sample burns with a popping noise.

Question 5

Question
Some calcium carbonate was heated strongly in a test tube and a gas was given off. What type of reaction was taking place?
Answer
  • oxidation
  • thermal decomposition
  • reduction

Question 6

Question
Which of these is the right percentage of element in the air (it is approximated/rounded)
Answer
  • Oxygen 21% Nitrogen 78% Argon 0.9% Carbon dioxide 0.037%
  • Oxygen 51% Nitrogen 28% Argon 0.9% Carbon dioxide 0.037% Hydrogen 20%
  • Oxygen 73% Carbon dioxide 27%

Question 7

Question
Which of these tests will test for anions?
Answer
  • Add silver nitrate solution to a solution of the substance in dilute nitric acid
  • Add dilute hydrochloric acid to the substance
  • Try to dissolve the substance in water with universal indicator solution.
  • Add barium chloride to the solution
  • Dip a rod in HCl then the substance and place over a bunsen
  • Add dilute ammonia solution
  • Add dilute sodium hydroxide

Question 8

Question
Ammonia turns red litmus blue
Answer
  • True
  • False

Question 9

Question
What does Iron(II) form when dilute sodium hydroxide solution is added. The same thing is formed when dilute ammonia solution is added.
Answer
  • Pale green precipitate
  • Rusty brown precipitate
  • White precipitate
  • Yellow precipitate
  • No change

Question 10

Question
The percentage of oxygen in the air can be measured by passing a known volume of air over hot copper and measuring the decrease in volume as the oxygen reacts with it.
Answer
  • True
  • False

Question 11

Question
Which gases does this method work best in making
Image:
031af359-1097-499c-923e-5a5d0508b9ae.gif (image/gif)
Answer
  • Hydrogen
  • Oxygen
  • Carbon dioxide
  • Ammonia
  • Chlorine

Question 12

Question
Which method is best for producing elements less dense than air ie hydrogen and ammonia
Answer

Question 13

Question
What elements are commonly created in this way and why?
Image:
98e390b0-1439-4309-b3e0-7610a99da89c.gif (image/gif)
Answer
  • Carbon dioxide and chlorine because they are more dense than air so move downward.
  • Ammonia and hydrogen because they are less dense than air so move up and along the tube better.
  • Hydrogen, oxygen and carbon dioxide because they are less soluble in water so easier to get out of the reaction mixture.

Question 14

Question
Ammonium ions can be identified in a solution by adding dilute nitric acid and heating. If present, they will be converted to ammonia gas
Answer
  • True
  • False

Question 15

Question
What does qualitative analysis mean?
Answer
  • Which substances are present
  • How much of each substance there is
  • The molecular formula of a substance

Question 16

Question
What does Quantitative analysis mean?
Answer
  • How much of each substance there is
  • Which substances are present
  • Whether it is an anion or ion

Question 17

Question
Which of these are the results for flame tests in this order: Lithium, Potassium, Sodium, Calcium, Barium, Copper, Lead
Answer
  • Red-pink, lilac, orange, red-orange, green-yellow, green, blue
  • Orange, lilac, red-orange, red-pink, blue, green, green-yellow
  • Red-orange, lilac, orange, blue ,green-yellow, green, red-pink

Question 18

Question
How many of these results are true when NaOH (sodium hydroxide) is added to them
Answer
  • Calcium - white
  • Copper(II) - blue precipitate formed
  • Iron(II) - green precipitate formed
  • Iron(III) - brown precipitate formed
  • Aluminium - White precipitate formed, dissolves in excess NaOH to give colourless solution
  • Magnesium - White precipitate formed
  • All of the above
  • Bromine - Cream precipitate formed

Question 19

Question
What can some of the noble gases be used for? (Hint 4 are correct)
Answer
  • Argon in filament lamps
  • Fluorine in perfume
  • Helium in airships
  • Argon to protect welded metals
  • Iodine in food colouring
  • Bromine in alchohol
  • Helium in party balloons

Question 20

Question
If you add dilute hydrochloric acid to bromide, iodide and chloride anions the results will be (in the same order): cream precipitate, yellow precipitate and white precipitate.
Answer
  • True
  • False

Question 21

Question
[blank_start]Group VII[blank_end] is called the halogens. They have [blank_start]7[blank_end] electrons in their outer shell and react to form [blank_start]ionic and covalent[blank_end] bonds. They exist naturally as [blank_start]pairs[blank_end] and each have a [blank_start]coloured[blank_end] vapour. They form [blank_start]salts[blank_end] when they react with alkali metals.
Answer
  • Group VII
  • Group VIII
  • Group I
  • 7
  • 8
  • 1
  • ionic and covalent
  • ionic
  • covalent
  • no
  • pairs
  • groups
  • herds
  • triplets
  • coloured
  • colourless
  • salts
  • liquids
  • gases
  • acids
  • alkalis

Question 22

Question
Hydrogen burns when heated in oxygen to form water. Initially the product will be formed as water vapour, but can be condensed to form water.
Answer
  • True
  • False

Question 23

Question
Describe the reactions of dilute hydrochloric and dilute sulfuric acids with magnesium, aluminium, zinc and iron
Answer
  • Magnesium - bubbles of gas, magnesium disappears, reaction mixture gets colder, colourless solution is formed
  • Aluminium - fast reaction and bubbles form, aluminum disappears, colourless solution formed
  • Zinc - bubbles of gas, zinc disappears, white solution formed
  • Iron - bubbles of gas, iron disappears, rusty brown solution formed
  • none of the answers

Question 24

Question
Identify compound A and B with these given test results. When sodium hydroxide solution is added A forms a white precipitate B forms no precipitate. When hyrochloric acid and barium chloride solution is added both form no precipitate. In a flame test A forms a red flame B forms a lilac flame. When nitric acid and silver nitrate is added A produces white precipitate B produces cream precipitate
Answer
  • A - Calcium chloride B - Potassium iodide
  • A - Lithium chloride B - Potassium sulphate
  • A - Lithium bromide B - Sodium chloride
  • A - Sodium iodide B - Calcium iodide

Question 25

Question
Is carbon dioxide a greenhouse gas, why? Does it contribute to global warming?
Answer
  • No because there is no evidence directly suggesting this
  • Carbon dioxide is a greenhouse gas because it absorbs infra-red radiation given off from Earth's surface. However it isn't contributing to climate change because climate change is a process that has been happening all the time for example ice ages like huronian and greenhouse periods like 368 million years ago in the Paleozoic Era.
  • No because there is more evidence suggesting that water vapour is the thing causing the global warming as it forms clouds causing the heat to be reflected and trapped, causing the earth to heat up more.
  • Carbon dioxide is a greenhouse gas because it absorbs infra-red radiation given off from Earth's surface. It is contributing to climate change because it is trapping the heat inside the earth's atmosphere causing it to heat up.

Question 26

Question
Are these uses for carbon dioxide? Making carbonated drinks, Fire extinguishers.
Answer
  • True
  • False

Question 27

Question
Group I is called the [blank_start]alkali earth metals[blank_end]. They all have [blank_start]1[blank_end] electron in their [blank_start]outer[blank_end] shell which makes them very [blank_start]unstable[blank_end] and reactive. The reactivity [blank_start]increases[blank_end] as you go down the group. They form [blank_start]ionic[blank_end] compounds with other [blank_start]non-metals[blank_end]. Sodium, Lithium and Potassium react in [blank_start]water[blank_end] to produce the gas [blank_start]hydrogen[blank_end].
Answer
  • hydrogen
  • 1
  • outer
  • unstable
  • increases
  • alkali earth metals
  • ionic
  • non-metals
  • water
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