As per the Annual Report 2023 – 24 of the Ministry of Mines, Government of India, which of the following are the major bauxite producing states in India?

Correct — B, Odisha and Jharkhand. India's bauxite output is overwhelmingly concentrated in one state and then thins out fast. Odisha alone supplies roughly two-thirds of the national total, from the great lateritic plateaus of the Eastern Ghats — the Panchpatmali deposits in Koraput district are the most important — with further workings in Kalahandi and Sambalpur. Jharkhand is the largest of the four option-states after it, drawing on the bauxite-capped patlands of the Lohardaga, Gumla and Ranchi country of the Chota Nagpur plateau, at around a tenth of national production. The other two options fail on scale rather than on existence: Madhya Pradesh does produce bauxite, around the Katni and Amarkantak country, but only a few per cent of the total, and Karnataka's output is minor. Note also what the options leave out — Gujarat, Chhattisgarh and Maharashtra each out-produce Madhya Pradesh — so the pair to pick is the one that names the leader and the strongest of the rest.

• (a)Odisha and Madhya Pradesh — Right about Odisha, wrong about the partner. Madhya Pradesh contributes only about 3 per cent of national bauxite production — behind Jharkhand, Gujarat, Chhattisgarh and Maharashtra. It is a familiar name because the standard description of India's bauxite deposits mentions the Amarkantak plateau, the Maikal hills and the Bilaspur-Katni country, but a deposit is not the same thing as output.
• (c)Jharkhand and Madhya Pradesh — Drops Odisha, which alone accounts for about two-thirds of the country's bauxite. No pairing that omits Odisha can describe India's major producers.
• (d)Jharkhand and Karnataka — Also drops Odisha, and adds a state whose bauxite production is marginal. Karnataka is a major producer of iron ore and manganese, not of bauxite.

Bauxite is the ore from which alumina and then aluminium are obtained. It is not a single mineral but a clay-like residue, formed by the decomposition of a wide range of aluminium-silicate rocks under prolonged tropical weathering, which is why India's deposits cap old plateau surfaces — laterite country in Odisha, Chhattisgarh, Jharkhand and the Maikal hills. Aluminium matters because it combines the strength of a metal such as iron with extreme lightness, good conductivity and great malleability, which makes it central to transport, transmission and packaging.

Mineral-production questions are dated by their source, so the exact percentages drift from one report year to the next. What does not drift is the order, and the order is what these options test. Odisha's dominance in bauxite is not a marginal lead but a two-thirds share, so any option omitting it can be struck out immediately, which reduces the item to a choice between Jharkhand and Madhya Pradesh as the second name. The habit worth building is to separate where a mineral is deposited from where it is produced: the standard sentence about India's bauxite deposits names Madhya Pradesh country, while the production chart puts Madhya Pradesh sixth.

• Odisha is India's largest bauxite producer, at roughly two-thirds of national output; the Panchpatmali deposits in Koraput district are the most important.
• State-wise shares of bauxite production for 2018-19 ran Odisha 65 per cent, Jharkhand 10, Gujarat 9, Chhattisgarh 6, Maharashtra 6 and Madhya Pradesh 3.
• Jharkhand's bauxite comes from the plateau tops of the Lohardaga, Gumla and Ranchi country of the Chota Nagpur plateau.
• India's bauxite deposits are chiefly found on the Amarkantak plateau, in the Maikal hills and in the plateau region of Bilaspur and Katni.
• Bauxite deposits form by the decomposition of a wide variety of rocks rich in aluminium silicates, and alumina and then aluminium are obtained from them.

• Confusing where a mineral is deposited with where it is produced — Madhya Pradesh is prominent in the deposit list and minor in the production list.
• Carrying over the iron-ore ranking, where Chhattisgarh and Karnataka stand high, to bauxite, where they do not.
• Quoting a share to the decimal point; different official series for different years give slightly different percentages, so hold the order rather than the number.

As a named-report question on the major producing states of a mineral, or as a match list pairing minerals with states or mining centres.

• practice — not a real PYQ

  The Panchpatmali deposits, the most important bauxite deposits in India's largest producing state, lie in which one of the following districts?

  • (a)Lohardaga
  • (b)Koraput
  • (c)Katni
  • (d)Balaghat

  Answer(b) Koraput — the Panchpatmali plateau in Koraput district of Odisha is the country's most important bauxite deposit.

• practice — not a real PYQ

  Bauxite deposits are typically formed by which one of the following processes?

  • (a)Cooling and crystallisation of magma at depth
  • (b)Decomposition of rocks rich in aluminium silicates under tropical weathering
  • (c)Evaporation of sea water in shallow basins
  • (d)Metamorphism of limestone under heat and pressure

  Answer(b) Decomposition of rocks rich in aluminium silicates under tropical weathering — the residual clay-like material left behind is bauxite.