Science Form 4 Chapter 9

The diagram 1 shows an experiment carried out to compare the formation of rust by

pure iron and an alloy iron.

Predict the correct observation after three days.

• Iron nail does not rust.

• Iron nail becomes more shiny.

• Steel nail does not rust.

• Steel nail becomes rusty.

Which of the following correctly describes the arrangement of pure metallic particles?

• Orderly

  
  

• Loosely packed

• Unevenly spread

• Difficult to slide over

The properties of alloy P are listed above. Alloy P can be used to make

• cars

• trumpet

• bridges

• aeroplane

Which diagram shows the structure of an alloyl?

• 
• 
• 
• 

The main component in clay is

• aluminium silicate

• silica

• silicon dioxide

• lead oxide

These apparatus are made from

• Lead crystal glass

• Soda-lima glass

• Fused silica glass

• Borosilicate glass

Lead crystal glass are made from composition of

(Choose the correct answers)

• Silica

• Boron oxide

• Calcium carbonate

• Sodium oxide

• Lead (II) oxide

Ceramic can be used to make these except

• bulb

• tableware

• tiles

• dentures

The following information is about an alloy.

What is the alloy?

• Duralumin

• Superconductor alloy

• Pewter

• Steel

Which of the following is NOT a characteristic of glass?

• Hard and brittle

• Transparent

• Porous

• Does not conduct heat and electricity