Methane
Nitrous oxide
Carbon dioxide
Hydrogen
Bromine is a
The hardest substance available on earth is
Tetraethyl lead is used as
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing
The gases used in different types of welding would include
The property of a substance to absorb moisture from the air on exposure is called
The average salinity of seawater is
When an iron nail gets rusted, iron oxide is formed
Galvanised iron sheets have a coating of
Among the various allotropes of carbon
