In which of the following activities silicon carbide is used?

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 allotrope 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:

The element common to all acids is

Non stick cooking utensils are coated with