Chemistry GCSE revision

Questão 1 de 27

1

Which two tests show a positive test for water?

Selecione uma ou mais das seguintes:

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

Explicação

Questão 2 de 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.

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 3 de 27

1

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

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 4 de 27

1

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

Selecione uma das seguintes:

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.

Explicação

Questão 5 de 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?

Selecione uma das seguintes:

oxidation
thermal decomposition
reduction

Explicação

Questão 6 de 27

1

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

Selecione uma das seguintes:

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%

Explicação

Questão 7 de 27

1

Which of these tests will test for anions?

Selecione uma ou mais das seguintes:

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

Explicação

Questão 8 de 27

1

Ammonia turns red litmus blue

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 9 de 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.

Selecione uma das seguintes:

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

Explicação

Questão 10 de 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.

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 11 de 27

1

Which gases does this method work best in making

Selecione uma ou mais das seguintes:

Hydrogen
Oxygen
Carbon dioxide
Ammonia
Chlorine

Explicação

Questão 12 de 27

1

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

Selecione uma ou mais das seguintes:

Explicação

Questão 13 de 27

1

What elements are commonly created in this way and why?

Selecione uma das seguintes:

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.

Explicação

Questão 14 de 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

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 15 de 27

1

What does qualitative analysis mean?

Selecione uma das seguintes:

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

Explicação

Questão 16 de 27

1

What does Quantitative analysis mean?

Selecione uma das seguintes:

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

Explicação

Questão 17 de 27

1

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

Selecione uma das seguintes:

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

Explicação

Questão 18 de 27

1

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

Selecione uma ou mais das seguintes:

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

Explicação

Questão 19 de 27

4

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

Selecione uma ou mais das seguintes:

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

Explicação

Questão 20 de 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.

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 21 de 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.

Arraste e solte para completar o texto.

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

Explicação

Questão 22 de 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.

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 23 de 27

1

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

Selecione uma ou mais das seguintes:

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

Explicação

Questão 24 de 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

Selecione uma das seguintes:

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

Explicação

Questão 25 de 27

1

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

Selecione uma das seguintes:

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.

Explicação

Questão 26 de 27

1

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

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 27 de 27

9

Preencha os espaços em branco para completar o texto.

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 .

	Criado por Scarlett Taylor mais de 9 anos atrás

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

Chemistry GCSE revision

Questão 1 de 27

Which two tests show a positive test for water?

Selecione uma ou mais das seguintes:

Explicação

Questão 2 de 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.

Selecione uma das opções:

Explicação

Questão 3 de 27

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

Selecione uma das opções:

Explicação

Questão 4 de 27

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

Selecione uma das seguintes:

Explicação

Questão 5 de 27

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

Selecione uma das seguintes:

Explicação

Questão 6 de 27

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

Selecione uma das seguintes:

Explicação

Questão 7 de 27

Which of these tests will test for anions?

Selecione uma ou mais das seguintes:

Explicação

Questão 8 de 27

Ammonia turns red litmus blue

Selecione uma das opções:

Explicação

Questão 9 de 27

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

Selecione uma das seguintes:

Explicação

Questão 10 de 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.

Selecione uma das opções:

Explicação

Questão 11 de 27

Which gases does this method work best in making

Selecione uma ou mais das seguintes:

Explicação

Questão 12 de 27

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

Selecione uma ou mais das seguintes:

Explicação

Questão 13 de 27

What elements are commonly created in this way and why?

Selecione uma das seguintes:

Explicação

Questão 14 de 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

Selecione uma das opções:

Explicação

Questão 15 de 27

What does qualitative analysis mean?

Selecione uma das seguintes:

Explicação

Questão 16 de 27

What does Quantitative analysis mean?

Selecione uma das seguintes:

Explicação

Questão 17 de 27

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

Selecione uma das seguintes:

Explicação

Questão 18 de 27

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

Selecione uma ou mais das seguintes:

Explicação

Questão 19 de 27

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

Selecione uma ou mais das seguintes:

Explicação

Questão 20 de 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.