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pain killer
fire extinguisher
mosquito repellent
petrol additive
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
The group of metals Fe, Co, Ni may best called as
Heavy water is
The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
