When wood is heated in the absence of air, the residue is called ________
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Short Answer Type
Give reasons: Diamond is used as an abrasive.
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Long Answer Type
What are allotropes? Sketch the structure of two allotropes of carbon family namely diamond and graphite. What is the impact of structure on physical properties of two allotropes?
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Short Answer Type
Give two important uses of each of diamond and graphite.
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Fill In the Blanks
The residue is also used for _________ of substances, e.g. sugar.
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The atoms in diamond are arranged in __________ pattern which account for its __________
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The residue can absorb fuel gases and is, therefore used in ___________