Question

2. Consider the following minerals :
1.
Bentonite
2.
Chromite
3.
Kyanite
4.
Sillimanite
In India, which of the above is/are officially
designated as major minerals ?​

Answer 1

Answer:

4.

Explanation:

Sillimanite is ur answer my frnd

Answer 2

Answer:

Bentonite, Kyanite, Sillimanite are considered as officially designated as major minerals in India.

Explanation:

• As per Govt. of India Notification S.O. 423(E) dated 10th February 2015 Bentonite has been declared as 'Minor Mineral'. Hence statement 1 is not correct.

Important Points

The Central Government has declared the following minerals as minor minerals:

Boulder, shingle, chalcedony pebbles used for ball mill purposes only, lime shell, kankar.

And limestone used in kilns for the manufacture of lime used as a building material.

Murrum, brick-earth, fuller’s earth, bentonite, road metal, reh-matti.

Slate and shale when used for building material, marble, stone used for making household utensils.

Quartzite and sandstone when used for purposes of building or for making road metal and household utensils, saltpeter, and ordinary earth

Used or filling or leveling purposes in construction or embankments, roads, railways, building.

Additional Information

Bentonite is essentially a highly plastic clay containing not less than 85% clay mineral, montmorillonite.

Chromite (Cr) is the single commercially viable ore of chromium which is chemically known as iron chromium oxide ($Fe.Cr_{2O_{4} }$).

Kyanite, Sillimanite, and andalusite are anhydrous aluminosilicate minerals that have the same

Chemical formula $AL_{2}O_{3}$ but differ in the crystal structure and physical properties.

Major minerals are classified as minerals that are required in the diet each day in amounts larger than 100 milligrams. These include sodium, potassium, chloride, calcium, phosphorus, magnesium, and sulfur.

As per Govt. of India Notification S.O. 423(E) dated 10th February 2015 Bentonite has been declared as 'Minor Mineral'.

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