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प्रश्न
Fill in the blank.
............. is the hardest substance that occurs naturally.
उत्तर
Diamond is the hardest substance that occurs naturally.
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संबंधित प्रश्न
Write true or false
Diamond is insoluble in all solvents.
Choose the correct alternative
Destructive distillation of coal yields
What is destructive distillation? What are the products formed due to the destructive distillation of coal?
Name the products formed when:
graphite is subjected to high pressure and 3000°C temperature.
FILL IN THE BLANK
Graphite is a good conductor of .............
TRUE \ FALSE
Synthetic diamonds are used for cutting glass and drilling rocks.
TRUE \ FALSE
Graphite is a poor conductor of electricity.
Explain the following.
Diamond, graphite and fullerenes are crystalline forms of carbon.
Explain the following.
Uses of various allotropes of carbon.
Compare the structure of the crystal of diamond & graphite with special reference to the reason for diamond being the hardest natural substance while graphite one of the softest. Compare the electrical & thermal conductivity of the two crystalline allotropes of carbon.
