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प्रश्न
What is buckminsterfullerene?
उत्तर
Buckminsterfullerene is an allotrope of carbon. It is a spherical shaped molecule containing 60 carbon atoms, arranged in interlocking 20 hexagonal and 12 pentagonal rings of carbon atoms.
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संबंधित प्रश्न
Elements forming ionic compounds attain noble gas configuration by either gaining or losing electrons from their outermost shells. Give reason to explain why carbon cannot attain noble gas configuration in this manner to form its compounds.
State the reason to explain why covalent compounds "have low melting and boiling points."
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What do you call the compounds having the same molecular formula but different structural arrangements of atoms?
Fill in the following blank with suitable word:
The form of carbon which is known as black lead is ...........
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The pencil leads are made of mainly:
(a) lithium
(b) charcoal
(c) lead
(d) graphite
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(a) 2
(b) 5
(c) 3
(d) 4
For each compound mentioned above give the formulae of ions formed in aqueous solution.
Give two example in following case:
Gaseous non polar compounds
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Covalent compounds are generally gases or liquids or soft solids.
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Give an example of the covalent bond formed by
(i) Similar atoms (ii) Dissimilar atoms
Name the anion present in the following compound:
When a barium chloride solution is added to a solution of compound B, a white precipitate insoluble in dilute hydrochloric acid is formed.
Generally, the melting and boiling point of carbon compounds are found to be less than _______ °C.
The number of electrons in the valence shell of a carbon atom is 4.
Non-polar covalent compounds are ______ conductors of heat and electricity.
