Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202226 JuneEvening Shift
Exam
JEE Main
Year
2022
Date
26 June
Shift
Evening Shift
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2022 · 26 June · Evening Shift · Chemistry · General Principles and Processes of Isolation of Metals

The role of depressants in 'Froth Floation method' is to

The role of depressants in 'Froth Floation method' is to

Options

  1. Aselectively prevent one component of the ore from coming to the froth.
  2. Breduce the consumption of oil for froth formation.
  3. Cstabilize the froth.
  4. Denhance non-wettability of the mineral particles.

Correct answer

A. selectively prevent one component of the ore from coming to the froth.

Step-by-step solution

In the froth floatation process, the role of the depressants is to separate two sulphide ores by selectively preventing one ore from forming froth.

For example, to separate two sulphide ores, PbSPbS and ZnS,NaCNZnS, NaCN is utilised. NaCNNaCN forms a combination with zinc on the surface of zinc sulphide, Na2[Zn(CN)4]{Na}_{2}\left[Zn{\left(CN\right)}_{4}\right], preventing ZnSZnS from foaming selectively.

4NaCN+ZnS⇒Na2[Zn(CN)4]+Na2S4NaCN + ZnS ⇒ {Na}_{2}\left[Zn{\left(CN\right)}_{4}\right] + {Na}_{2}S

Practice General Principles and Processes of Isolation of Metals on Quantrex Academy →

More from General Principles and Processes of Isolation of Metals

Identify the incorrect pair from the following : JEE Main 2024The correct statement(s) related to processes involved in the extraction of metals is(are) JEE Advanced 2023Which one of the following is not an example of calcination? JEE Main 2023Given below are two statements related to Ellingham diagram : Statement I : Ellingham… JEE Main 2023Which one of the following is most likely a mismatch? JEE Main 2023Given below are two statements: one is labelled as Assertion A and the other is labelled… JEE Main 2023Given below are two statements: Statement I: In the metallurgy process,sulphide ore is… JEE Main 2023In the extraction process of copper, the product obtained after carrying out the… JEE Main 2023 Full General Principles and Processes of Isolation of Metals list All JEE Main PYQs