Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

Gold is leached using CN − solution followed by reduction with Zn . What is the co-ordination number of Zn in the final product?

Options

  1. A2
  2. B6
  3. C5
  4. D4

Correct answer

D. 4

Step-by-step solution

4Au   +   8CN −   +   2H 2 O   +   O 2 → 4 Au CN 2 − +   4OH − 2 A u C N 2 - + Z n → Z n C N 4 2 - + 2 A u

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 : 2024The correct statement(s) related to processes involved in the extraction of metals is(are) 2023Which one of the following is not an example of calcination? 2023Given below are two statements related to Ellingham diagram : Statement I : Ellingham diagrams can be constructed for formation of oxides, sulphides and halides of metals. Statemen 2023Which one of the following is most likely a mismatch? 2023Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: In the Ellingham diagram, a sharp change in slope of the line is o 2023Given below are two statements: Statement I: In the metallurgy process,sulphide ore is converted to oxide before reduction. Statement II: Oxide ores in general are easier to reduce 2023In the extraction process of copper, the product obtained after carrying out the reactions (i) 2 Cu 2 S + 3 O 2 ⟶ 2 Cu 2 O + 2 SO 2 (ii) 2 Cu 2 O + Cu 2 S ⟶ 6 Cu + SO 2023 Full General Principles and Processes of Isolation of Metals list All NTA Abhyas JEE Main PYQs