One of the following metals is obtained by leaching its ore with

One Of The Following Metals Is Obtained By Leaching Its Chemistry Question

One of the following metals is obtained by leaching its ore with dilute cyanide solution, Identify it.

Options

(a) titanium
(b) vanadium
(c) silver
(d) zinc

Correct Answer:

silver

Explanation:

Cyanide process: ‘Mac Arthur – forest cyanide process.’ The powdered argentite ore is agitated with a dilute solution of NaCN(0.5%) while a current of O₂ is constantly passed. The metallic silver or silver from the ore dissolves forming sodium argentocyanide. 2Ag₂S +8NaCN + O₂ + 2H₂O → 4Na[Ag(CN)₂] + 4NaOH + 2S. The soluble silver complex is filtered and treated with zinc dust when silver gets precipitated. 2Na[Ag(CN₂)] + Zn →Na₂[Zn(CN)₄] + 2Ag↓.

Related Questions:

  1. 6.4 g SO₂ at 0⁰C and 0.99 atm pressure occupies a volume of 2.24 L
  2. Which of the following is true about ClO₂
  3. Kinetic theory of gases presumes that collision between the molecules to be perfectly
  4. For the reaction , X₂O₄(l) → 2XO₂(g), ΔG is
  5. Bond length between hybridised carbon atom and other carbon atom is minimum in

Topics: Surface Chemistry and Isolation of Elements (88)
Subject: Chemistry (2512)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*