Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 201910 JanuaryEvening Shift
Exam
JEE Main
Year
2019
Date
10 January
Shift
Evening Shift
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2019 · 10 January · Evening Shift · Chemistry · General Principles and Processes of Isolation of Metals

The electrolytes usually used in the electroplating of gold and...

The electrolytes usually used in the electroplating of gold and silver, respectively, are:

Options

  1. A[Au(NH3)2]+{\left[Au{\left({NH}_{3}\right)}_{2}\right]}^{+} and [Ag(CN)2]−{\left[Ag{\left(CN\right)}_{2}\right]}^{-}
  2. B[Au(CN)2]−{\left[Au{\left(CN\right)}_{2}\right]}^{-} and [AgCl2]−{\left[{AgCl}_{2}\right]}^{-}
  3. C[Au(OH)4]−{\left[Au{\left(OH\right)}_{4}\right]}^{-} and [Ag(OH)2]−{\left[Ag{\left(OH\right)}_{2}\right]}^{-}
  4. D[Au(CN)2]−{\left[Au{\left(CN\right)}_{2}\right]}^{-} and [Ag(CN)2]−{\left[Ag{\left(CN\right)}_{2}\right]}^{-}

Correct answer

D. [Au(CN)2]−{\left[Au{\left(CN\right)}_{2}\right]}^{-} and [Ag(CN)2]−{\left[Ag{\left(CN\right)}_{2}\right]}^{-}

Step-by-step solution

The solution of dicyano complexes of gold (Au)( Au ) and silver (Ag)( Ag ) are used as electrolytes while performing electroplating with them.

The amine complexes of gold are not stable, so, they cannot be used.

Silver cyanide is employed as cyanide reacts with silver to form stable complexes.

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