Q90. Which industry is covered by the policy of progressive de-licensing in the given choices?
[SSC CPO, 27 June 2024]
(A) Coal and lignite
(B) Industrial explosives
(C) Tobacco products
(D) Hazardous chemicals
Answer: (A) Coal and lignite
Explanation: India has undertaken gradual reforms to facilitate commercial coal and lignite mining, including changes to licensing and allocation arrangements. Other sectors such as industrial explosives and hazardous chemicals remain subject to specific regulatory controls because of safety and security concerns.
Q89. Manganese is used in which of the following?
[Bihar Teacher Recruitment Examination TRE 3.0, 19 July 2024]
(A) Photography
(B) Matchboxes
(C) Dry-cell batteries
(D) More than one of the above
Answer: (D) More than one of the above
Explanation: Manganese compounds have diverse applications beyond the major use of manganese in steelmaking. Manganese dioxide is used in certain dry-cell batteries and chemical processes, while manganese compounds have also had photographic and match-industry uses. Thus more than one option applies.
Q88. Consider manganese ore: (A) Odisha has substantial deposits. (B) It is used in steelmaking. (C) Pyrolusite is an ore of manganese. (D) Gondite and kodurite are associated with manganese. Which are correct?
[TSPSC Group I Preliminary Examination, 9 June 2024]
(A) A and B only
(B) A, B and C only
(C) B, C and D only
(D) A, B, C and D
Answer: (D) A, B, C and D
Explanation: Manganese occurs in several Indian geological belts. Pyrolusite is manganese dioxide, while gondite and kodurite describe manganese-bearing rocks or associations. The mineral is central to steel metallurgy, and Odisha is an important manganese-resource state. Accordingly all four statements are valid.
Q87. Which of the following is a uranium-mining location in India?
[OSSC CGL Recruitment Examination Mains, 1 September 2024]
(A) Jaduguda
(B) Kiriburu
(C) Joda
(D) Hirapur
Answer: (A) Jaduguda
Explanation: Jaduguda in Jharkhand’s Singhbhum region is a notable Indian uranium-mining centre. Kiriburu and Joda are associated mainly with iron-ore mining. Uranium belongs to the atomic-mineral category and is particularly important for nuclear fuel.
Q86. Which gas is commonly released from coal mines and marshes?
[SSC CPO, 29 June 2024, Shift 1]
(A) Nitrogen dioxide
(B) Ozone
(C) Methane
(D) Steam
Answer: (C) Methane
Explanation: Methane forms through anaerobic decomposition of organic matter and can accumulate in coal seams. Its release from mines creates both explosion hazards and greenhouse-gas emissions. Mine ventilation, gas drainage and monitoring are consequently important aspects of safe coal production.
Q85. Identify the correct association of Rajasthan’s copper-mining areas among Khetri, Alwar, Bhilwara and Udaipur.
[RSMSSB Lower Division Clerk, 11 August 2024]
(A) Khetri–Bhilwara–Alwar–Udaipur
(B) Khetri–Alwar–Bhilwara–Udaipur
(C) Alwar–Khetri–Bhilwara–Udaipur
(D) Alwar–Bhilwara–Udaipur–Khetri
Answer: (B) Khetri–Alwar–Bhilwara–Udaipur
Explanation: Rajasthan’s copper occurrences extend through several districts of the Aravalli region, including Jhunjhunu, Alwar, Bhilwara and Udaipur. The Khetri copper belt in Jhunjhunu is especially prominent. Correct ordering requires recognising the mining-area and district associations referenced in the paper.
Q84. The Durg–Bastar–Chandrapur iron-ore belt extends across which two states?
[SSC MTS, 7 October 2024, Shift 3]
(A) Karnataka and Goa
(B) Chhattisgarh and Maharashtra
(C) Odisha and Jharkhand
(D) Madhya Pradesh and Gujarat
Answer: (B) Chhattisgarh and Maharashtra
Explanation: The Durg–Bastar–Chandrapur belt extends through Chhattisgarh and Maharashtra. It includes the high-grade iron-ore deposits of Bailadila and other central Indian mining areas. Ore from this belt supports steel production and mineral transport networks.
Q83. Which is NOT one of India’s principal iron-ore belts?
[SSC MTS, 18 October 2024, Shift 3]
(A) Durg–Bastar–Chandrapur
(B) Maharashtra–Goa
(C) Odisha–Jharkhand
(D) Bilaspur–Panipat
Answer: (D) Bilaspur–Panipat
Explanation: India’s principal iron-ore belts include Odisha–Jharkhand, Durg–Bastar–Chandrapur, Maharashtra–Goa and Ballari–Chitradurga–Chikkamagaluru–Tumakuru. Bilaspur–Panipat is not a recognised major iron-ore belt. Mapping these belts is more useful than simply memorising individual mines.
Q82. Which state is associated with significant deposits of limestone, gypsum, salt and zinc?
[UPPSC Review Officer/Assistant Review Officer, 11 February 2024]
(A) Haryana
(B) Rajasthan
(C) Gujarat
(D) Punjab
Answer: (B) Rajasthan
Explanation: Rajasthan possesses extensive limestone and gypsum resources, significant salt deposits in saline lakes and rich zinc–lead mineralisation in the Aravalli belt. This diversity supports cement, chemicals and non-ferrous metallurgy. Zawar and Rampura Agucha are notable zinc-related areas.
Q81. Which iron-ore deposit and state are incorrectly matched?
[SSC MTS, 9 October 2024, Shift 3]
(A) Badampahar — Odisha
(B) Kudremukh — Karnataka
(C) Ratnagiri — Madhya Pradesh
(D) Bailadila — Chhattisgarh
Answer: (C) Ratnagiri — Madhya Pradesh
Explanation: Ratnagiri is in Maharashtra rather than Madhya Pradesh. Badampahar is associated with Odisha’s iron-ore belt, Kudremukh lies in Karnataka and Bailadila in Chhattisgarh. These location pairings help distinguish India’s major peninsular iron-ore provinces.
