Chapter 5 Metallurgy

Aluminium is very ------------ and malleable.

Aluminium react slowly with dilute ------------ acid to give aluminium sulphate.

The reduction of metallic oxide with aluminium is known as the ---------------------.

Metallic aluminium is very reactive with atomspheric oxygen forming a thin protective layer of ---------------- which is fairly chemically inert.

Fe₂ O₃ and ------------ ores are suitable for the extraction of iron.

Iron is a ----------- in colour.

Molten iron flows to bottom of the furnace at ------------- C.

The ---------- of pure iron is 1538 ᾽Ϲ .

Iron is used in civil engineering like reinforced concrete, ---------.

When chlorine passes over heated iron, iron is oxidised to ---------.