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

In which of the following activities silicon carbide is used?

The average salinity of sea water 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

The element common to all acids is

Non stick cooking utensils are coated with

Monazite is an ore of

Carbon, diamond and graphite are together called

Potassium nitrate is used in