Solved UPSC CDS/OTA Question
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Q · Mineralsmedium · 45s
Which mineral shows a greasy feel when touched?
TopicMinerals
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Talc, graphite, and serpentine all exhibit a greasy or soapy feel when touched. This tactile property results from their layered crystal structures with weak bonds between layers, allowing them to slide past each other easily. This characteristic makes these minerals useful as lubricants and contributes to their distinctive feel that aids in identification.
Final Answer: Option D - All of the above