Graphite is used as a lubricant in machines because-
(a) It is good conductor of electricity
(b) It has a high melting point and slippery layers
(c)Its density ranges from 1.9 to 2.3 g/cm3
(d) It is strong and strong
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(b) It has a high melting point and slippery layers
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Answer:
(b) it has high melting point and slippery layers.
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