+91-8076753736[email protected]
logo
logo
-->

General Principles And Processes Of Isolation Of Elements

Question
CBSEENCH12011440
Wired Faculty App

Extraction of gold and silver involves leaching with CN– ion. Silver is later recovered by

  • Liquation

  • Distillation

  • Zone refining

  • Displacement with Zn

Solution

D.

Displacement with Zn

4 space Ag space plus space 8 NaCN space plus space 2 straight H subscript 2 straight O space plus space straight O subscript 2 space rightwards arrow with Leaching on top stack space 4 Na left square bracket Ag left parenthesis CN right parenthesis subscript 2 right square bracket with soluble space sodium space dicyanoargentate space left parenthesis left parenthesis right parenthesis below space plus space 4 NaOH 2 Na left square bracket Ag left parenthesis CN right parenthesis subscript 2 right square bracket space plus space Zn space rightwards arrow with Displacement on top space Na subscript 2 left curly bracket Zn left parenthesis CN right parenthesis subscript 4 space plus space 2 Ag

Some More Questions From General Principles And Processes of Isolation Of Elements Chapter

Which of the ores mentioned in Table 6.1. could be concentrated by magnetic separation method?
Table 6.1 Principal ores of some important metal.

What is the significance of leaching in the extraction of aluminium?

Is it true that under certain conditions. Mg can reduce Al2O3 and Al can reduce MgO? What are those conditions?

What is the role of depressant in froth floatation process?

Titanium is a metal of modern times. It is obtained as oxide. Why it could not be extracted earlier despite its wide occurence?

Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?

What criterion is followed for the selection of the stationary phase in chromatography?

What is the role of cryolite in the metallurgy of aluminium?

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation