Question

describe the principles of extraction of each of the following
a. sn from sno2
b. Zn from zno2
c. cr from cr2o3​

Answer 1

chemistry/class-11

AnSwer :-

(a) Sn from SnO₂

SnO₂ in crushed Concentrated roasted and washed then is smelted with powered an throate in a blast furnace to obtain tin.

${ \bf SnO_2 + 2C \longrightarrow Sn + 2CO}$

(b) Zn from ZnO

ZnO is mixed with powdered coke and then it is reduced to Zn metal

$\bf ZnO + C \longrightarrow Zn + CO$

(c) Cr from Cr₂O$_3$

CrO₂ is mixed with powdered aluminium and in ignited in a closed esurcible by inserting a burning Mg ribbon into ignition of mixed consulting of Mg power and barium proxide

$\bf{2Al + Cr_2O_3 \longrightarrow Al_2O_3 + Cr}$