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प्रश्न
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is:
(a) fifty
(b) sixty
(c) seventy
(d) ninety
उत्तर
sixty
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is 60.
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संबंधित प्रश्न
List three characteristic properties of covalent compounds.
Explain the nature of the covalent bond using the bond formation in CH3Cl.
How does graphite act as a lubricant?
What type of bonds are present in water molecule? Draw the electron-dot structure of water (H2O).
What type of bonds are present in methane (CH4) and sodium chloride (NaCl)?
What is buckminsterfullerene?
Give two example in following case:
Gaseous non polar compounds
Explain the following term with example.
Unsaturated hydrocarbon
Write answer as directed.
What causes the existance of very large number of carbon compound ?
Explain the following:
Covalent compounds have low melting and boiling point.
The molecule which contains a triple covalent bond is ______.
Which of the following is a common characteristic of a covalent compound?
What are the term defined below?
A bond formed by share pair of electrons, each bonding atom contributing one electron to the pair.
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.
Which of the following statements are correct for carbon compounds?
- Most carbon compounds are good conductors of electricity.
- Most carbon compounds are poor conductors of electricity.
- Force of attraction between molecules of carbon compounds is not very strong.
- Force of attraction between molecules of carbon compounds is very strong.
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
Which of the following are correct structural isomers of butane?
- \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - C - H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - H}\\
|\phantom{.....}|\phantom{.....}|\\
\ce{H}\ce{H-C-H}\ce{H}\\
|\\
\ce{H}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - H}\\
|\phantom{.....}\backslash\phantom{..}|\\
\phantom{....}\ce{H}\phantom{......}\ce{C - H}\phantom{}\\
\phantom{.......}|\\
\phantom{.......}\ce{H}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\\
\ce{H - C - C - H}\\
|\phantom{....}|\\
\ce{H - C - C - H}\\
|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\\
\end{array}\]
______ is an example of a covalent compound having a high melting point.
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?
Non-polar covalent compounds are ______ conductors of heat and electricity.
