propene

isoprene

2-methylpropene

None of the above

Methylbutene

3-methylbut-1,3-diene

2-methylbut-1,3-diene

2-methylbut-1,4-diene

Ethanol

Ammonia solution

Ethanoic acid

Water

ethanoic acid

aqueous ammonia

sodium chloride

ethyl ethanoate

To preserve the latex

To coagulate latex

To improve the quality of latex

To prevent the coagulation of latex

Withstands high temperature

Exists as a white solid at room temperature

Coagulates when an alkali is added

Contains a monomer called isoprene

Harder than unvulcanised rubber

Stronger than unvulcanised rubber

Heat-resistant

Oxidation-resistant

Propanoic acid

Sodium sulphite

Sulphur monochloride

Ammonium hydroxide

latex is less elastic.

Latex consists of rubber particles and water.

Bacterial activity produces acid that coagulates the latex.

Latex is easily oxidised by oxygen.

Lighter than unvulcanised rubber

More elastic than unvulcanised rubber

Can withstand high temperature

Resistant to oxidation

ethanoic acid

sulphuric acid

ammonia solution

disulphur dichloride solution

vulcanised rubber is easily oxidised

vulcanised rubber can withstand high temperatures

unvulcanised rubber is stronger and harder

unvulcanised rubber is more elastic