Which two of these elements are metals?
I. Iodine
II. Aluminium
III. Zinc
IV. Carbon
I and II
II and III
III and IV
IV and I
Most metals can be drawn into thin unbroken wires. This property is called
Allotropy
Conductivity
Ductility
Malleability
Which one of the following is used for the vulcanisation of rubber?
Carbon
Phospohorus
Sulphur
Chlorine
Which of these metals is found in the alloys of brass and bronze?
Copper
Zinc
Iron
Tin
An element 'X' is light, resists corrosion and is a good conductor of heat and electricity. It can be used to make alloys that are light and strong. The element 'X' is
Aluminium
Aluminium foil used for wrapping ____________.
Food
Clothes
Plastic
Wires
Which of the following will displace copper from a solution of copper (II) sulphate?
I. Zn
II. Fe
III. Ag
IV. Mg
I and II only
II and III only
I, II and III only
I, II and IV only
All types of steel essentially contain
Iron and manganese
Iron and carbon
Manganese and chromium
Carbon and manganese
Gold is used in _________________.
Thermometer
Fuel
Jewellery
Machinery
Stainless steel (an alloy containing iron, chromium and nickel) does not rust because
Iron form a hard chemical with chromium
Chromium form a coating of oxide that protects iron
Nickel does not rust
None of these
