JEE Main Chemistry question

Lubricating properties of graphite are diminished in the presence of:

(A)High pressure
(B)Low pressure
(C)VacuumCorrect
(D)None of these

Answer: (C)

Solution

Graphite's lubricating ability depends on weakly-bound layers sliding over one another, a process facilitated by adsorbed moisture/gas molecules between the layers; in a vacuum (where no such

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Question ID VK-141769