Question

Assertion: For the extraction of iron, haematite ore is used.

Reason: Haematite is a carbonate ore of iron.
1. Only the reason is correct
2. Both the assertion and reason are correct, but the reason is not the correct explanation for the assertion.
3. Both the assertion and reason are correct and the reason is the correct explanation for the assertion.
4. Only the assertion is correct.

Answer 1

Correct Answer - Option 4 : Only the assertion is correct.

Concept:

For the extraction of iron, haematite ore (Fe₂ O₃) is used.

Hematite is a common iron oxide with the formula Fe₂ O₃ and is widespread in rocks and soils.

Hematite crystallizes in the rhombohedral lattice system, and it has the same crystal structure as ilmenite and corundum. Hematite and ilmenite form a complete solid solution at temperatures above 950 °C. Huge deposits of hematite are found in banded iron formations.

Iron (III) oxide or ferric oxide is the inorganic compound with the formula Fe₂O₃. It is one of the three main oxides of iron, the other two being iron (II) oxide and (FeO), which is rare and iron (II, III) oxide (Fe₃O₄), which also occurs naturally as the mineral magnetite.

As the mineral known as hematite, Fe₂O₃ is the main source of iron for the steel industry. Fe₂O₃ is readily attacked by acids. Iron (III) oxide is often called rust because rust shares several properties and has a similar composition.

Thus, only the assertion is correct.