Q39.Which refining process is generally used in the purification of low melting metals? (1) Chromatographic method (2) Electrolysis (3) Zone refining (4) Liquation
What This Question Tests
This question tests the knowledge of various refining methods in metallurgy and their specific applications, particularly for low melting metals.
Concepts Tested
📚 NCERT Sections This Tests
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.
4.11 — Explain Giving Reasons:
Chemistry Class 11 · Chapter 4
4.11 Explain giving reasons: (i) Transition metals and many of their compounds show paramagnetic behaviour. (ii) The enthalpies of atomisation of the transition metals are high. (iii) The transition metals generally form coloured compounds. (iv) Transition metals and their many compounds act as good catalyst.
📋 Question Details
- Chapter
- Metallurgy
- Topic
- Refining of metals
- Year
- 2021
- Shift
- 27 Aug Shift 1
- Q Number
- Q39
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 6: General Principles and Processes of Isolation of Elements
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