Fewpal
0 votes
132 views
in Chemistry by (57.6k points)
edited by

NaCN is sometimes added in the forth flotation process as a depressant when ZnS and PbS minerals are expected because : 

(A) Pb(CN)2 is precipitated while no effect on ZnS. 

(B) ZnS forms soluble complex Na2[Zn(CN)4] while PbS forms froth 

(C) PbS forms soluble complex Na2[Pb(CN)4] while ZnS forms froth. 

(D) NaCN is never added in froth floatation process.

1 Answer

+1 vote
by (63.6k points)
selected by
 
Best answer

(B) ZnS forms soluble complex Na2[Zn(CN)4] while PbS forms froth.

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.

Categories

...