| ⇦ | 
| ⇨ |
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: - The temperature, at which heavy water has maximum density is
- When the temperature of reactions will increases then the effect on pH value will
- When formaldehyde is polymerised in the presence of dilute H₂SO₄, the compound
- Schottky defect generally appears in
- Which of the following inert gases does not have eight electrons
Topics: Surface Chemistry and Isolation of Elements
(88)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The temperature, at which heavy water has maximum density is
- When the temperature of reactions will increases then the effect on pH value will
- When formaldehyde is polymerised in the presence of dilute H₂SO₄, the compound
- Schottky defect generally appears in
- Which of the following inert gases does not have eight electrons
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.
Share this page with your friends
Leave a Reply