Chemistry GCSE revision

Question 1 of 27

1

Which two tests show a positive test for water?

Select one or more of the following:

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

Explanation

Question 2 of 27

1

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.

Select one of the following:

True
False

Explanation

Question 3 of 27

1

If you add dilute sulphuric acid to a solution of calcium it will produce a white pecipitate

Select one of the following:

True
False

Explanation

Question 4 of 27

1

What are the tests to identify gases in this order: oxygen, hydrogen, carbon dioxide.

Select one of the following:

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.

Explanation

Question 5 of 27

1

Some calcium carbonate was heated strongly in a test tube and a gas was given off. What type of reaction was taking place?

Select one of the following:

oxidation
thermal decomposition
reduction

Explanation

Question 6 of 27

1

Which of these is the right percentage of element in the air (it is approximated/rounded)

Select one of the following:

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%

Explanation

Question 7 of 27

1

Which of these tests will test for anions?

Select one or more of the following:

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

Explanation

Question 8 of 27

1

Ammonia turns red litmus blue

Select one of the following:

True
False

Explanation

Question 9 of 27

1

What does Iron(II) form when dilute sodium hydroxide solution is added. The same thing is formed when dilute ammonia solution is added.

Select one of the following:

Pale green precipitate
Rusty brown precipitate
White precipitate
Yellow precipitate
No change

Explanation

Question 10 of 27

1

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.

Select one of the following:

True
False

Explanation

Question 11 of 27

1

Which gases does this method work best in making

Select one or more of the following:

Hydrogen
Oxygen
Carbon dioxide
Ammonia
Chlorine

Explanation

Question 12 of 27

1

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

Select one or more of the following:

Explanation

Question 13 of 27

1

What elements are commonly created in this way and why?

Select one of the following:

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.

Explanation

Question 14 of 27

1

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

Select one of the following:

True
False

Explanation

Question 15 of 27

1

What does qualitative analysis mean?

Select one of the following:

Which substances are present
How much of each substance there is
The molecular formula of a substance

Explanation

Question 16 of 27

1

What does Quantitative analysis mean?

Select one of the following:

How much of each substance there is
Which substances are present
Whether it is an anion or ion

Explanation

Question 17 of 27

1

Which of these are the results for flame tests in this order: Lithium, Potassium, Sodium, Calcium, Barium, Copper, Lead

Select one of the following:

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

Explanation

Question 18 of 27

1

How many of these results are true when NaOH (sodium hydroxide) is added to them

Select one or more of the following:

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

Explanation

Question 19 of 27

4

What can some of the noble gases be used for? (Hint 4 are correct)

Select one or more of the following:

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

Explanation

Question 20 of 27

1

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.

Select one of the following:

True
False

Explanation

Question 21 of 27

6

❌ is called the halogens. They have ❌ electrons in their outer shell and react to form ❌ bonds. They exist naturally as ❌ and each have a ❌ vapour. They form ❌ when they react with alkali metals.

Drag and drop to complete the text.

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

Explanation

Question 22 of 27

1

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.

Select one of the following:

True
False

Explanation

Question 23 of 27

1

Describe the reactions of dilute hydrochloric and dilute sulfuric acids with magnesium, aluminium, zinc and iron

Select one or more of the following:

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

Explanation

Question 24 of 27

1

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

Select one of the following:

A - Calcium chloride B - Potassium iodide
A - Lithium chloride B - Potassium sulphate
A - Lithium bromide B - Sodium chloride
A - Sodium iodide B - Calcium iodide

Explanation

Question 25 of 27

1

Is carbon dioxide a greenhouse gas, why? Does it contribute to global warming?

Select one of the following:

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.

Explanation

Question 26 of 27

1

Are these uses for carbon dioxide? Making carbonated drinks, Fire extinguishers.

Select one of the following:

True
False

Explanation

Question 27 of 27

9

Fill the blank spaces to complete the text.

Group I is called the . They all have electron in their shell which makes them very and reactive. The reactivity as you go down the group. They form compounds with other . Sodium, Lithium and Potassium react in to produce the gas .

	Created by Scarlett Taylor over 9 years ago

tests for gases, producing gases, test for anions and cations, flame tests, percentage of gases, CO2 and climate change, combustion

Chemistry GCSE revision

Question 1 of 27

Which two tests show a positive test for water?

Select one or more of the following:

Explanation

Question 2 of 27

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.

Select one of the following:

Explanation

Question 3 of 27

If you add dilute sulphuric acid to a solution of calcium it will produce a white pecipitate

Select one of the following:

Explanation

Question 4 of 27

What are the tests to identify gases in this order: oxygen, hydrogen, carbon dioxide.

Select one of the following:

Explanation

Question 5 of 27

Some calcium carbonate was heated strongly in a test tube and a gas was given off. What type of reaction was taking place?

Select one of the following:

Explanation

Question 6 of 27

Which of these is the right percentage of element in the air (it is approximated/rounded)

Select one of the following:

Explanation

Question 7 of 27

Which of these tests will test for anions?

Select one or more of the following:

Explanation

Question 8 of 27

Ammonia turns red litmus blue

Select one of the following:

Explanation

Question 9 of 27

What does Iron(II) form when dilute sodium hydroxide solution is added. The same thing is formed when dilute ammonia solution is added.

Select one of the following:

Explanation

Question 10 of 27

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.

Select one of the following:

Explanation

Question 11 of 27

Which gases does this method work best in making

Select one or more of the following:

Explanation

Question 12 of 27

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

Select one or more of the following:

Explanation

Question 13 of 27

What elements are commonly created in this way and why?

Select one of the following:

Explanation

Question 14 of 27

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

Select one of the following:

Explanation

Question 15 of 27

What does qualitative analysis mean?

Select one of the following:

Explanation

Question 16 of 27

What does Quantitative analysis mean?

Select one of the following:

Explanation

Question 17 of 27

Which of these are the results for flame tests in this order: Lithium, Potassium, Sodium, Calcium, Barium, Copper, Lead

Select one of the following:

Explanation

Question 18 of 27

How many of these results are true when NaOH (sodium hydroxide) is added to them

Select one or more of the following:

Explanation

Question 19 of 27

What can some of the noble gases be used for? (Hint 4 are correct)

Select one or more of the following:

Explanation

Question 20 of 27

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.