Edexcel GCSE Chemistry Topic 9 Separate chemistry 2 overview quiz quiz

Red

Yellow

Blue-green

Lilac

Green

Blue

Brown

White

Add acidified silver nitrate solution and look for a coloured precipitate

Add dilute acid and test for carbon dioxide with limewater

Add barium chloride solution and look for a white precipitate forming

Carry out a flame test and observe the colour produced by the flame

Add dilute nitric acid and then silver nitrate solution and look for a precipitate

Add sodium hydroxide solution; a blue precipitate forms which confirms the sulfate

Add hydrochloric acid then barium chloride; a white precipitate confirms sulfate

Carry out a flame test and identify the sulfate from the colour of the flame

White, the colour given by chloride ions

Cream, the colour given by bromide ions

Green, the colour of an iron(II) precipitate

Yellow

$-OH$

$-COOH$

$-C=C-$

$-NH_2$

Methane

Ethanoic acid

Ethene

Carbon monoxide

It is always present as a very dilute solution with few particles

It does not react with carbonates the way strong acids do

It is only partially dissociated into ions in solution

It contains no hydrogen ions at all when it is dissolved in water

Monomers join together and release a small water molecule every single time

A long polymer chain breaks down into many separate small monomers

Atoms are destroyed as the monomers join to form the polymer chain

Many alkene monomers join to form one long chain with no other product

It releases a small molecule such as water each time monomers join

It makes no polymer product at all, only small separate molecules of water

It uses only alkene monomers with carbon to carbon double bonds

It destroys the monomers completely instead of joining them up

They dissolve in water and pollute rivers and the sea quickly

They are not biodegradable, so they persist in landfill

They evaporate quickly into the air and form harmful vapours

They react readily with the oxygen in the air at room temperature

Only the total financial cost of making and selling the finished product

Only the manufacturing stage, ignoring raw materials and disposal

The environmental impact at every stage from raw materials to disposal

Only how the product is used once it has reached the customer