Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Confused! kindly explain, Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by :

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

  • Option 1)

    liquation

  • Option 2)

    distillation

  • Option 3)

    zone refining

  • Option 4)

    displacement with Zn

 

Answers (1)

As we learnt in

Leaching -

In this process we use suitable agent  which react with ore to form water soluble complex while impurities are insoluble 

- wherein

Ag2S +NaCN \overset{O2}{\rightarrow} Na [Ag (CN)2] 

Na [Ag (CN)2] + Zn{\rightarrow} Na2 [Zn(CN)4] +Ag {\downarrow}

 

 

 

 In the process of leaching, we use an angent which reacts with are to form water soluble complex while impurities are insoluble. 

Ag_{2}S+NaCN \xrightarrow[]{O_{2}}Na[Ag(CN)_{2}]

Na[Ag(CN)_{2}]+Zn\rightarrow Na_{2}[Zn(CN)_{4}]+Ag\downarrow


Option 1)

liquation

Incorrect

Option 2)

distillation

Incorrect

Option 3)

zone refining

Incorrect

Option 4)

displacement with Zn

Correct

Posted by

Sabhrant Ambastha

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NTA re-opens NEET UG correction window 2024; update photographs till April 26
anam-khan

NEET UG 2024 exam city slip out at neet.ntaonline.in; over 25 lakh candidates to appear
anam-khan

NEET UG city intimation slip likely today at exams.nta.ac.in/NEET; barred item at exam centre

Latest Question