Question 1

Rare earth elements are highly scarce and physically rare in the Earth's crust.

Accepted Answer

Rare earth elements are relatively abundant globally; elements like Cerium are more common than copper or lead.

Question 2

The primary use of permanent magnets is in traditional electronics like audio speakers and hard drives.

Accepted Answer

While historically true, the current massive global demand surge is driven by traction motors in Electric Vehicles (EVs) and generators in direct-drive wind turbines.

Question 3

Consider the following statements regarding Rare Earth Elements (REEs) and their processing in India:
1. Sintered Rare Earth Permanent Magnets (REPM) primarily utilize Neodymium and Praseodymium extracted from minerals like monazite.
2. The Mines and Minerals (Development and Regulation) Amendment Act, 2023, removed Monazite from the list of atomic minerals to allow unrestricted private mining.
3. India possesses the world's largest reserves of Rare Earth Elements but imports finished magnets due to a lack of processing technology.
How many of the above statements are correct?

Accepted Answer

(a) Only one — Statement 1 is correct; Neodymium and Praseodymium (NdPr) are the primary light rare earths used in high-strength NdFeB permanent magnets. Statement 2 is incorrect; while the 2023 MMDR amendment removed six minerals (like Lithium and Niobium) from the atomic minerals list, Monazite remains classified as an atomic mineral due to its radioactive Thorium content. Statement 3 is incorrect; China holds the world's largest REE reserves, while India holds the 5th largest.

Question 4

Match List I (Element/Mineral) with List II (Key Application/Characteristic):
List I:
A. Neodymium
B. Monazite
C. Samarium
D. Dysprosium

List II:
1. Phosphate mineral found in Indian beach sands that is a primary ore for REEs
2. Heavy rare earth added to magnets to prevent demagnetization at high temperatures
3. Primary light rare earth used to create standard high-strength magnets for EV motors
4. Used alongside cobalt to create highly temperature-resistant aerospace magnets

Select the correct answer using the codes given below:

Accepted Answer

(a) A-3, B-1, C-4, D-2 — Neodymium (A) is the crucial component for NdFeB magnets used in EVs (3). Monazite (B) is the primary ore found in Indian coastal sands (1). Samarium (C) is combined with Cobalt (SmCo magnets) for high-temperature military/aerospace applications (4). Dysprosium (D) is a heavy REE added to NdFeB magnets to improve their heat resistance (2).

Question 5

Assertion (A): The Government of India has introduced capital subsidies and sales-linked incentives specifically for the manufacturing of Sintered Rare Earth Permanent Magnets.
Reason (R): The primary mining of monazite sand has been completely deregulated and privatized, leading to an oversupply of raw rare earth oxides that require domestic consumption.
Select the correct answer using the codes given below:

Accepted Answer

(c) A is true but R is false. — The Assertion is true; the Rs 7,280 crore scheme offers these specific incentives to build a 6,000 MTPA capacity. The Reason is false; primary mining of monazite has NOT been deregulated or privatized. It remains under the strict monopoly of the state (IREL) due to the presence of radioactive thorium. The scheme is actually necessary because the lack of a private primary mining sector means massive government support is needed to make downstream processing financially viable.

Scheme for Rare Earth Magnets Manufacturing

Centenary of INC's 1925 Kanpur Session