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प्रश्न
Graphite is used as a lubricant in machines because ______.
विकल्प
it is a good conductor of electricity.
it has a high melting point and slippery layers.
its density ranges from 1.9 to 2.3 g/cm3.
it is strong and soft.
MCQ
रिक्त स्थान भरें
उत्तर
Graphite is used as a lubricant in machines because it has a high melting point and slippery layers.
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