Food cans are coated with tin and not with zinc because
Zinc is costlier than tin
Zinc has higher melting point than tin
Zinc is more reactive than tin
Zinc is less reactive than tin
Which is the purest form of iron?
Cast iron
Steel
Stainless steel
Wrought iron
Am element 'X' is soft and can be cut with a knife. This is very reactive to air and cannot be kept in open air. It reacts with water. Identify the element from the following.
Mg
Na
S
Hg
Which is used in machine parts due to its high tensile strength?
Pig iron
Hematite
Which metal is used as an electrode in dry cell?
Zinc
Iron
Mercury
Aluminium
The metal which does not react with dilute H2SO4
Zn
Al
In the blast furnace iron oxide is reduced by
Lime stone
Calcium silicate
Carbon monoxide
Carbon dioxide
Brass is an alloy of
Copper and tin
Copper and zinc
Zinc and lead
Lead and tin
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
Brass
Gun metal
Amalgam
The metal having the highest density is
Lithium
Iridium
Calcium
Diamond