Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Mineralsmedium · 45s
Which mineral is the main source of lithium?
TopicMinerals
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
← Previous questionQ 60 / 60
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Spodumene, lepidolite, and petalite are all important lithium-bearing minerals. Spodumene [LiAlSi₂O₆] is currently the most economically significant source, while lepidolite [K(Li,Al)₃(Al,Si)₄O₁₀(F,OH)₂] and petalite [LiAlSi₄O₁₀] also contribute to lithium production. With growing demand for lithium in batteries for electric vehicles and energy storage, these minerals have become increasingly valuable. Additionally, lithium is extracted from salt brines in some regions.
Final Answer: Option D - All of the above