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The magnetic oxide of iron is:
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Hematite () is an anti-ferromagnetic material below the Morin transition at 250 K, and a canted anti-ferromagnet or weakly ferromagnetic above the Morin transition.
Magnetite (Fe3O4) is a ferrimagnetic material, which is also easily available and possesses considerable magnetic properties
Rest are non-magnetic at all temperatures.
Option B is correct.
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Practice questions from similar books
Question 1
Assertion :In the metallurgy of iron, limestone is added to the oreReason :In the metallurgy of iron, limestone (CaCO) acts as a flux and forms calcium silicate CaSiO(slag).
Read the above assertion and reason and choose the correct option regarding it.
Question 2
The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.Question 3
Answer the following questions briefly.(i) What is the actual reducing agent of haematite in blast furnace?
(ii) Give the equations for the recovery of lead from galena by air reduction
(iii) Why is sodium chloride added during electrolysis of fused anhydrous magnesium chloride?
(iv) Zinc, not copper, is used for the recovery of metallic silver from the complex , explain.
(v) Why is chalcocite roasted and not calcinated during recovery of copper?
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| Question Text | The magnetic oxide of iron is: |
| Answer Type | Text solution:1 |
| Upvotes | 150 |
