LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
in Chemistry by (95.1k points)
closed by
Describe the role of the following :
(i) NaCl in the extraction of silver from a silver ore
(ii) Iodine in the refining of titanium
(iii) Cryolite in the metallurgy of aluminium

1 Answer

0 votes
by (94.5k points)
selected by
Best answer
(i) Role of NaCl in the extraction of silver is to do the leaching of silver ore in the presence of air from which the silver is obtained later by replacement
`4 Ag(s) + 8CN^(-)(aq)+2 H_(2)O(aq)+O_(2)(g) to 4[Ag(CN)_(2)]^(-)(aq) +4 OH^(-)(aq)`
` 2[Ag(CN)_(2)]^(-)(aq)+Zn(s) to 2 Ag (s)+[Zn(CN)_(4)]^(2-)(aq)`
(ii) Iodine is heated with Titanium to form a voilatile compound which on further heating decompose to give pure titanium
`T_(i)("impure")+2I_(2) toT_(i)I_(4) to T_(i)("Pure")+2I_(2)`
(iii) Cryolite lowers the melting point of the mixture and improves the electrical conductivity of the cell .

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.