Form 4 Chemicals in Industry

Why alloy is stronger?

• The presence of foreign atom prevent the sliding of pure atoms layers.

• The presence of foreign atom which is bigger

• The presence of foreign atom which is smaller

Which of the following is not the characteristic of alloy?

• high melting point

• softer

• not malleable

• more resistance to corrosion

Which of the following is the component which made up duralumin?

• aluminium and copper

• copper and zinc

• zinc and aluminium

• tin and copper

Which of the following are examples of alloy?

• brass

• pewter

• silicon

• titanium

What is the main component which made up of glass?

• clay

• kaolin

• silicon

• sand

Which type of glass that use to make apparatus in the laboratory such as test tube and beakers.

• fused silica glass

• borosilicate glass

• soda lime glass

• lead glass

What process is shown in the diagram?

• polymerisation

• depolymerisation

• coagulation

• vulcanisation

Which of the following are examples of synthetic polymers?

• nylon

• starch

• rubber

• perspex

Which of the following is the characteristic of natural rubber?

• elastic

• hard

• strong

• resistant to oxidation

Which substance can prevent coagulation of rubber to occur?

• ethanoic acid

• ammonia solution