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Assertion 1: The structure of graphite is layered, and it has a relatively lower melting point than diamond.
Reasoning 1: Graphite consists of layers of hexagonal rings of carbon atoms, and these layers are held together by weak van der Waals forces. These weak forces allow the layers to slide over each other easily, making graphite a soft and lubricating solid. In contrast, diamond has a three-dimensional network of carbon atoms that are bonded tetrahedrally, resulting in its extremely high melting point.
Both the assertion and reasoning are true, and the reasoning is the correct explanation for the assertion.
Both the assertion and reasoning are true, but the reasoning is not the correct explanation for the assertion.
The assertion is true, but the reasoning is false.
The assertion is false, but the reasoning is true.
Answers (1)
The assertion that "The structure of graphite is layered, and it has a relatively lower melting point than diamond" is true. Graphite consists of layers of hexagonal rings of carbon atoms that are bonded together by weak van der Waals forces. These weak forces allow the layers to slide over each other easily, making graphite a soft and lubricating solid. In contrast, diamond has a three-dimensional network of carbon atoms that are bonded tetrahedrally, resulting in its extremely high melting point. The reasoning that "Graphite consists of layers of hexagonal rings of carbon atoms, and these layers are held together by weak van der Waals forces. These weak forces allow the layers to slide over each other easily, making graphite a soft and lubricating solid. In contrast, diamond has a three-dimensional network of carbon atoms that are bonded tetrahedrally, resulting in its extremely high melting point" is also true and is the correct explanation for the assertion. The weak van der Waals forces between the layers of graphite allow them to slide over each other easily, making graphite a soft and lubricating solid. In contrast, the strong covalent bonds between the carbon atoms in diamond result in a rigid structure that requires a lot of energy to break, leading to its high melting point.
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