RAS question
Dolomite in Rajasthan is found primarily in:
Correct answer: (A) Udaipur, Ajmer, Bhilwara.
Dolomite in Rajasthan is found primarily in Udaipur, Ajmer and Bhilwara districts of the Aravalli region.
Explanation
Dolomite is an important non-metallic mineral in Rajasthan, with the state having significant reserves. The official Department of Mines and Geology page estimates Rajasthan's dolomite resources at 599.40 million tonnes and lists important deposits in several districts. For this RAS question, the key exam grouping is the Aravalli-region cluster of Udaipur, Ajmer and Bhilwara. Important dolomite deposits include Bajla-Kabra in Ajmer, Mandal and Koshithal in Bhilwara, and Iswal and Kalora in Udaipur. That makes option A the best answer: it gives the recognised district set rather than a western Rajasthan or limestone-heavy distractor.
Why the other options are wrong
- (B) Jodhpur is associated in the question data with sandstone, and the Jodhpur-Barmer pair does not match the Aravalli-region dolomite cluster of Udaipur, Ajmer and Bhilwara.
- (C) Jaisalmer is associated in the question data with limestone, so a single Jaisalmer answer misses the primary Udaipur-Ajmer-Bhilwara grouping.
- (D) Kota-Bundi is not the district set identified for dolomite here; the official dolomite list gives Ajmer, Bhilwara and Udaipur for the answer.
Concept
This tests Rajasthan's mineral-distribution map, especially non-metallic minerals of the Aravalli belt. RAS repeats such questions because district-mineral pairing is a standard way to test economic geography without asking for long descriptive answers.