Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Advanced 2021Paper 1
Exam
JEE Advanced
Year
2021
Paper
Paper 1
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Advanced 2021 · Paper 1 · Chemistry · General Principles and Processes of Isolation of Metals

The correct statement (s) related to the metal extraction processes...

The correct statement (s)\left(s\right) related to the metal extraction processes is(are)

Options

  1. AA mixture of PbSPbS and PbOPbO undergoes self-reduction to produce PbPb and SO2.{SO}_{2} .
  2. BIn the extraction process of copper from copper pyrites, silica is added to produce copper silicate.
  3. CPartial oxidation of sulphide ore of copper by roasting, followed by self-reduction produces blister copper.
  4. DIn cyanide process, zinc powder is utilized to precipitate gold from Na[Au(CN)2].Na\left[Au{\left(CN\right)}_{2}\right] .

Correct answer

A. A mixture of PbSPbS and PbOPbO undergoes self-reduction to produce PbPb and SO2.{SO}_{2} .

Step-by-step solution

(A)PbS+PbO→Pb+SO2\left(A\right) PbS + PbO \to Pb + {SO}_{2}

It is self-reduction reaction.

\left(B\right)Intheextractionprocessofcopperfromcopperpyrites,silicaisaddedtoproduceIronsilicate.</p><p>In the extraction process of copper from copper pyrites, silica is added to produce Iron silicate.</p><p>\left(C\right)Partialoxidationofsulphideoreofcopperbyroasting,followedbyself−reductionproducesblistercopper.</p><p>Partial oxidation of sulphide ore of copper by roasting, followed by self-reduction produces blister copper.</p><p>{Cu}_{2}S + {O}_{2}\to{Cu}_{2}O + {SO}_{2}</p><p></p><p>{Cu}_{2}S + 2{Cu}_{2}O\mathop{\to}_{self - reduction}6Cu + {SO}_{2}</p><p>(D)Zn+2Na[Au(CN)2]→Na2[Zn(CN)4]+2Au</p><p>\left(D\right) Zn + 2Na\left[Au{\left(CN\right)}_{2}\right] \to {Na}_{2}\left[Zn{\left(CN\right)}_{4}\right] + 2Au

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 Advanced PYQs