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Questions and Answers
Which of the following allotropes of carbon is the hardest material known?
Which of the following allotropes of carbon is the hardest material known?
Which of the following allotropes of carbon is used as a lubricant?
Which of the following allotropes of carbon is used as a lubricant?
Which of the following allotropes of carbon is commonly used in pencils?
Which of the following allotropes of carbon is commonly used in pencils?