Purification And Characterisation Of Organic Compounds Question 175
Question: Pb and Sn are extracted from their chief ore by
[IIT-JEE Screening 2004]
Options:
A) Carbon reduction and self-reduction.
B) Self reduction and carbon reduction.
C) Electrolysis and self-reduction.
D) Self-reduction and electrolysis.
Show Answer
Answer:
Correct Answer: B
Solution:
$ PbO $ & $ PbSO_4 $ get reduced by PbS itself which is already present in mixture so because the reduction took place by mixture itself, hence is known as self reduction.
$ 2PbO+PbS\xrightarrow{\Delta }3Pb+SO_2\uparrow $
$ PbSO_4+PbS\xrightarrow{\Delta }2Pb+2SO_2\uparrow $
BETA
