When the surface of metal is attacked by air, water and some other substance is said to be

In joining railway tracks or cracked machine parts, reaction of Fe₂O₃ with a metal is ulitized. That metal is

How many non metals are there

_____________ water is advised to kept away from skin and eyes.

_______________ alloys being preferred to copper alloys for manufacturing cooking utensils.

Excess of _______________ in the body lead to disease known as siderosis

Ores mined from earth usually contain unwanted material called

Cathodic protection is a method for preventing

Best malleable metals

Which is not a metal but it has been assigned a place in the activity series of metal?