Which one of the following minerals is used during the manufacturing of steel to make it hard?

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Manganese

Titanium

Chromium

Tungsten

answer is A.

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Detailed Solution

Manganese minerals are used during the manufacturing of steel to make it hard.
Manganese metal is used during the manufacturing of steel to make it harder. Manganese is a ferrous ore which means it contains iron content, but it is not a good conductor of heat and electricity. This mineral is used to mix steel to increase its strength. For example, 10 kg of manganese is required to produce one tonne of steel. In addition to this, manganese is also used in the manufacturing of paints, insecticides, and some other items. Some of the major producers of manganese are Odisha (the leading one), Karnataka, and Madhya Pradesh.

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