(a) 1
(b) 2
(c) 3
(d) 4
Answer:
The removal of gangue from the ore is collect
(a) Hand picking
(b) Leaching
(c) Concentration
(d) Liquation
Answer:
Which of the following processes is not used for the purification of solid impurities?
(a) Vaporization
(b) Crystallization
(c) Sublimation
(d) Distillation
Answer:
Non ferromagnectic element is
(a) Co
(b) Mn
(c) Ni
(d) Fe
Answer:
Which is the used in storage batteries
(a) Lead
(b) Tin
(c) Zinc
(d) Cu
Answer:
Most impure form of carbon is
(a) Wood charcoal
(b) Lamp black
(c) Graphite
(d) Anthracite
Answer:
Which of he following glasses is used in making wind screen of automobiles
(a) Jena
(b) Crook's
(c) Safety
(d) Pyrex
Answer:
Nitrogen combines with metal to form
(a) Nitrosyl chloride
(b) nitrate
(c) Nitride
(d) Nitrite
Answer:
The coloured discharge tubes for advertisement mainly contain
(a) Argon
(b) Xenon
(c) Neon
(d) Helium
Answer:
The noble gas used for treatment of cancer is
(a) Radon
(b) Krypton
(c) Argon
(d) Helium
Answer: