Chemistry
to the mass of a
value of x is
rty is not common
ays?
on zns screen
and magnetic field
53. extraction of chromium is done from chromite ore
(feo cr2o3) by using following steps
4feo cr2o3 + 8na, co, + 70,
- na, croa + 2fe2o3 + 8c02
2na, cro, +h,804-> na cr202 + na so, + h20
na, cr, o, + 3c - na, cr,04+ 300
na cr2o4 + h2o → cr2o3 + 2naoh
cr2o3 + 2a1 a1,o2 + 2cr
if 0.2 mole of chromite ore is used initially and rest!
of the reactants are in excess, then mole of
chromium formed will be
(1) 0.2
(2) 0.4
(3) 0.3
(4) 0.6
the moon coloured niament in plants
dent of the nature
tube