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प्रश्न
Graphite is used as a lubricant in machines because ______.
विकल्प
it is a good conductor of electricity
it is made of slippery layers and has a high melting point
it has a high density
it is strong and soft
MCQ
रिक्त स्थान भरें
उत्तर
Graphite is used as a lubricant in machines because it is made of slippery layers and has a high melting point.
shaalaa.com
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