Purification And Characterisation Of Organic Compounds Question 95
Question: Zone refining is a method to obtain
[KCET 1993]
Options:
A) Very high temperature
B) Ultra-pure Al
C) Ultra-pure metals
D) Ultra-pure oxides
Show Answer
Answer:
Correct Answer: C
Solution:
Zone refining is employed for preparing extremely pure metals.
It is based on the principle that when a molten solution of the impure metal is allowed to cool the pure metal crystallises out while the impurities remain in the melt.
Ex : Semiconductors like Si, Ge and Ga are purified by this method.
BETA
