Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Write the role of (i) NaCN in the extraction of gold from its ore. (ii) Cryolite in the extraction of aluminium from pure alumina. (iii) CO in the purification of Nickel.   &

Write the role of
(i) NaCN in the extraction of gold from its ore.
(ii) Cryolite in the extraction of aluminium from pure alumina.
(iii) CO in the purification of Nickel.

 

 

 

 
 
 
 
 

Answers (1)

(i)    Dilute NaCN is added as a reagent which selectively dissolves the gold on but not the impurities.

(ii)    Cryolite \left(Na_3AlF_6 \right ) decreases the melting point and increases conductivity.

(iii)    CO helps to convert nickel to a volatile complex which is collected elsewhere and thin decomposed to give pure metal.

Posted by

Sumit Saini

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE opens application to access 10th answer scripts; verification, revaluation for Class 12 starts on May 31
anam-khan

CBSE supplementary exams 2025 from July 15; form submission starts on May 30
anam-khan

CBSE 12th result 2025 sees more in compartment, JNVs on top, perfect-scorers in minor subjects

Latest Question