RAS question
Didwana Lake is famous for which resource?
Correct answer: (D) Salt production.
Didwana Lake in Nagaur district is famous for salt production.
Explanation
Didwana Lake is a major saline lake in Nagaur district, and its exam importance comes from its direct link with salt. The official Initial Environmental Examination: Didwana Sewerage Subproject, Local Self Government Department, Government of Rajasthan describes Didwana as a saline lake/playa in western Rajasthan and states that the Didwana playa supports commercial salt production. Didwana is also part of the standard Rajasthan geography grouping with Sambhar and Pachpadra among the important salt-producing lakes of the state. The resource clue is therefore not a mineral like mica or marble, and not a freshwater resource; the lake's saline character is precisely why it is associated with salt production.
Why the other options are wrong
- (A) Mica is not linked to Didwana Lake; the lake is identified with salt because it is saline.
- (B) Marble is not the resource associated with Didwana Lake; Didwana supports commercial salt production, not stone extraction.
- (C) Freshwater fish does not fit because Didwana is described as a saline lake, so the relevant resource is salt rather than a freshwater product.
Concept
This tests Rajasthan's saline lakes and their economic uses, a recurring RAS geography theme because lakes such as Sambhar, Didwana and Pachpadra are standard examples of salt-producing sites. It also checks whether aspirants connect a lake's water character with its resource use.