The property of a substance to absorb moisture from the air on exposure is called
A). Osmosis
B). Deliquescence
C). Efflorescence
D). Desiccation
The gases used in different types of welding would include
A). Oxygen and Hydrogen
B). Oxygen, Hydrogen, Acetylene and Nitrogen
C). Oxygen, Acetylene and Argon
D). Oxygen and Acetylene
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
A). Argon
B). Xenon
C). Helium
D). Krypton
Which of the following is used as a lubricant?
A). Graphite
B). Silica
C). Iron Oxide
D). Diamond
Tetraethyl lead is used as
A). Pain Killer
B). Fire Extinguisher
C). Mosquito Repellent
D). Petrol Additive