16.
Tetraethyl lead is used as

17.
Which of the following is used as a lubricant?

18.
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

19.
The gases used in different types of welding would include

20.
The property of a substance to absorb moisture from the air on exposure is called

Read More Section(General Science)

Each Section contains maximum 70 questions. To get more questions visit other sections.