Which of the following statement are correct?
(i)The liquation process is used for the purifiction of so
(ii)`Ca and Mg` are extracted by electroloytie reduction
(iii)The amalganation method is used in the parification of `Ag`
(iv)The electrometallagical process (electrolysis of fased salts) is employed in extract sodium

Options

A. (i)(ii),(iii),(iv)
B. (ii),(iii),(iv)
C. (i),(iii)
D. (iii),(ii),(iv)

Answer

a

Explanation

Amalgemation process an old method of extraction of Ag is still in use in some countries .The salphide ore of Ag is creeshed and converted into a slime with a silation of capric cloride
`Ag_(2)S + CaCI rarr 2AgCI + CuS`
Some reacury libercating silver
`AgCI + 2Hg rarr 2Ag + Hg CI_(2)`
The metal silver which is washed and the dissible Ag left betind in the retorts