Q. The hardest substance available on earth is

View solution

Q. The variety of coal in which the deposit contains recognisable traces of the original plant material is

View solution

Q. Tetraethyl lead is used as

View solution

Q. Which of the following is used as a lubricant?

View solution

Q. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

View solution

Q. The gases used in different types of welding would include

View solution

Q. The property of a substance to absorb moisture from the air on exposure is called

View solution

Q. In which of the following activities silicon carbide is used?

View solution

Q. The average salinity of sea water is

View solution

Q. When an iron nail gets rusted, iron oxide is formed

View solution

Q. Galvanised iron sheets have a coating of

View solution

Q. Among the various allotropes of carbon,

View solution

Q. The group of metals Fe, Co, Ni may best called as

View solution

Q. Heavy water is

View solution

Q. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

View solution

Q. The element common to all acids is

View solution

Q. Non stick cooking utensils are coated with

View solution

Q. Monazite is an ore of

View solution

Q. Carbon, diamond and graphite are together called

View solution

Q. Potassium nitrate is used in

View solution