Natural Rubber and Synthetic rubber

Which of the following is not the Malaysia’s major exports

• rubber gloves,

• condoms

• catheters

• ballons

What is the monomer of natural rubber?

• vinyl chloride

• propene

• stryene

• isoprene

identify the homologous series for isoprene?

• alkane

• alkyne

• carboxylic acid

• alkene

Diagram shows latex in natural rubber.Diagram show

• rubber polymer

• isoprene

• rubber monomer

• no answer

What is IUPAC name for isoprene

• 2-methylbut-1,3-diene.

• 2-methylbut-2,3-diene.

• 3-methylbut-1,3-diene.

• 2-methylbut-1,4-diene.

Why rubber does not coagulate?

• protein membrane of rubber particles is negatively charged on the outer surface.

• This causes rubber particles to repel each other

• This causes rubber particles to attract each other

• protein membrane of rubber particles is positively charged on the outer surface.

What is the factor that affects the resistance of natural rubber towards oxidation by air?

• The characteristics of natural rubber

• rubber polymers

• natural elastomeric polymers.

• The presence of double bond C=C in the rubber polymerstructure

What is the Characteristics of natural rubber

• soft

• elastic

• not Waterproof

• not easily oxidised

• not reactive to chemical

At high temperature, natural rubber will become soft and sticky.Based on the statement,what is the Characteristics of natural rubber

• soft

• not Waterproof

• not easily oxidised

• Low heat resistance

• not Reactive to chemicals

The limitations found in natural rubber can be overcome

• The characteristics of natural rubber

• adding certain additives to obtain the desired characteristics.

• natural elastomeric polymers.

• The presence of double bond C=C in the rubber polymerstructure