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प्रश्न
Why is diamond clear and hard while graphite is soft?
उत्तर
Carbon atoms in diamond are bonded in a strong tetrahedron pattern making it hard and clear whereas carbon atoms in graphite are bonded in weak covalent bonds making it soft and black.
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संबंधित प्रश्न
Write True or False. Rewrite the false statement correctly :
Igneous and sedimentary rocks can change into metamorphic rocks.
Classify the following rocks by selecting the correct option given below:
gneiss
Classify the following rocks by selecting the correct option given below:
granite
Explain this term associated with rocks: Lithification of Rocks.
Classify the following rock: Shale
Classify the following rock: Dolomite
Why are crystalline rocks called so?
Statement (1) : Sedimentary rocks consist of many layers.
Statement (2) : Sedimentary rocks are formed by the sediments deposited at different points of time
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
