Form 4 Science

• monomer

• monimer

• polymer

• polimer

• monomer

• monimer

• polymer

• polimer

Starch is made from monomers ( )

• cellulose

• glucose

• amino acids

• isoprene

Natural rubber is made from monomers ( )

• starch

• cellulose

• glucose

• isoprene

Polythene is made from monomers ( )

• ethene

• methyl methacrylate

• chloropylene

• plastic

• polymerisation

• polimerisation

• depolymerisation

• depolimerisation

• polimerisation

• polymerisation

• depolimerisation

• depolymerisation

Properties of natural rubber,except

• soft

• elastic

• cannot withstand heat

• soluble only in water

When an acid is added to latex, the latex will

• soft

• hard

• coagulate

• no coagulate

Vulcanised rubber has ( ) atoms forming cross-links with the rubber molecules?

• silicate

• silicon

• sulphur

• sulphur dioxide