Advertisements
Advertisements
प्रश्न
Describe the role of the Cryolite in the extraction of aluminium from pure alumina.
उत्तर
(a) It lowers the melting point of bauxite.
(b) It increases the conductivity of the electrolyte.
APPEARS IN
संबंधित प्रश्न
What is the chemical composition of malachite?
- CuO . CuC03
- Cu(OH)2 CuC03
- CuO.Cu(OH)2
- Cu2O . Cu(OH)2
Write chemical formulae of the following ores :
(a) Calamine
(b) Haematite
(c) Magnetite
(d) Corundum
Fe2O3 is reduced to spongy iron near the top of blast furance by
(A) H2
(B) CaO
(C) SiO2
(D) CO
Which of the ores mentioned can be concentrated by magnetic separation method?
Define Leaching.
Explain the following methods to protect metals from corrosion:
Passivation
What happens when a nickel rod is dipped into a copper sulphate solution? Justify your answer.
`[E_((Ni^(+2))/(Ni))^0 = -0.25"v" and E _(("Cu"^(+2))/("Cu"))^0 = +0.34"v"]`
How will you convert the following:
[Ag(CN)2]− to Ag
Give the uses of zinc.
In the thermite process, the reducing agent is:
