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प्रश्न
Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many pentagons of carbon atoms are present in one molecule of buckminsterfullerene?
उत्तर
In one molecule of buckminsterfullerene, 12 pentagons of carbon atoms are present.
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संबंधित प्रश्न
What are covalent compounds?
Fill in the following blank with suitable word:
The general formula CnH2n for cycloalkanes is the same as that of ...........
Explain why covalent compounds have generally high melting points?
Draw the electron-dot structure of CO2 compound and state the type of bonding.
Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond.
what substance is graphite made?
A saturated hydrocarbon has fifty hydrogen atom in its molecule. The number of carbon atoms in its molecule will be
(a) twenty five
(b) twenty four
(c) twenty six
(d) twenty seven
State the type of bonding in the following molecule.
Methane
Which element exhibits the property of catenation to maximum extent and why?
Match the pairs.
| Group 'A' | Group 'B' |
| a. C2H6 | 1. Unsaturated hydrocarbon |
| b. C2H2 | 2. Molecular formula of an alcohol |
| c. CH4O | 3. Saturated hydrocarbon |
| d. C3H6 | 4. Triple bond |
Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in?
Generally, the melting and boiling point of carbon compounds are found to be less than _______ °C.
Write an Explanation.
Alkane
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{.........}\ce{H}\\ \phantom{.........}|\\ \ce{H - C ≡ C - C - H}\\ \phantom{.........}|\\ \phantom{.........}\ce{H} \end{array}\] |
The correct structural formula of butanoic acid is -
Which of the following statements are usually correct for carbon compounds? These
- are good conductors of electricity
- are poor conductors of electricity
- have strong forces of attraction between their molecules
- do not have strong forces of attraction between their molecules.
Cation is formed when ______.
______ is an example of a covalent compound having a high melting point.
"Carbon prefers to share its valence electrons with other atoms of carbon or with atoms of other elements rather than gaining or losing the valence electrons in order to attain noble gas configuration." Give reasons to justify this statement.
State the reasons, why carbon cannot
- Lose four electrons to form C4+ cation and
- Gain four electrons to form C4- anion.
How does carbon overcome this problem to form compounds?
