Q39.The methods NOT involved in concentration of ore are (A) Liquation (B) Leaching (C) Electrolysis (D) Hydraulic washing (E) Froth floatation Choose the correct answer from the options given below: (1) B, D and C only (2) C, D and E only (3) A and C only (4) B, D and E only
What This Question Tests
This question differentiates between ore concentration methods and other metallurgical processes like refining or extraction, requiring identification of methods NOT used for concentration.
Concepts Tested
📚 NCERT Sections This Tests
5.27 — Discuss Briefly Giving An Example In Each Case The Role Of Coordination
Chemistry Class 11 · Chapter 5
5.27 Discuss briefly giving an example in each case the role of coordination compounds in: (i) biological systems (iii) analytical chemistry (ii) medicinal chemistry and (iv) extraction/metallurgy of metals.
4.14 — Describe The Preparation Of Potassium Dichromate From Iron Chromite Ore.
Chemistry Class 11 · Chapter 4
4.14 Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing pH on a solution of potassium dichromate?
2.2 — Given The Standard Electrode Potentials,
Chemistry Class 11 · Chapter 2
2.2 Given the standard electrode potentials, K+/K = –2.93V, Ag+/Ag = 0.80V, Hg2+/Hg = 0.79V Mg2+/Mg = –2.37 V, Cr3+/Cr = – 0.74V Arrange these metals in their increasing order of reducing power.
📋 Question Details
- Chapter
- Metallurgy
- Topic
- Concentration of ores
- Year
- 2023
- Shift
- 31 Jan Shift 1
- Q Number
- Q39
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 6: Metallurgy
More from this Chapter
Q62.Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly? JEE Main 2008 JEE Main Previous Year Paper (1) Metal sulphides are thermodynamically more (2) CO2 is thermodynamically more stable than CS2 stable than CS2 (3) Metal sulphides are less stable than the (4) CO2 is more volatile than CS2 corresponding oxides
Q41.Which of the oxide groups among the following cannot be reduced by carbon? (1) Cu2O, SnO2 (2) CaO, K2O (3) PbO, Fe2O4 (4) Fe2O3, ZnO
Q52.In the electrolysis of alumina to obtain aluminium metal, cryolite is added mainly to (1) lower the melting point of alumina (2) dissolve alumina in molten cryolite (3) remove the impurities of alumina (4) increase the electrical conductivity
Q52.Extraction of zinc from zinc blende is achieved by (1) roasting followed by self-reduction (2) electrolytic reduction (3) roasting followed by reduction with carbon (4) roasting followed by reduction with another metal