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प्रश्न
How buckminsterfullerene is it related to diamond and graphite?
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उत्तर
Buckminstterfullerene along with diamond and graphite are allotropes of the element carbon with symbol C.
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संबंधित प्रश्न
How does graphite act as a lubricant?
What do you call the compounds having the same molecular formula but different structural arrangements of atoms?
Fill in the blank in the following sentence:
Two atoms of the same element combine to form a molecule. The bond between them is known as ................ bond.
Give one example, state what are covalent compounds?
Draw the electron-dot structure of a hydrogen chloride molecule.
Which inert gas does the H atom in HCl resemble in electron arrangement?
State any two uses of diamond.
Buckminsterfullerene is an allotropic form of the element:
(a) phoshorus
(b) fluorine
(c) carbon
(d) sulphur
A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be
(a) 200
(b) 198
(c) 202
(d) 196
Explain the Structural isomerism term with example.
Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the options A, B, C and D given below:
X is likely to have a ______.
Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in?
State the type of bond formed when the combining atom has zero E.N. difference.
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If the compound formed between A and B is melted and an electric current is passed through the molten compound, the element A will be obtained at the ______ and B at the ______ of the electrolytic cell.
Fill in the blank and rewrite the completed statement:
Covalent compounds are generally soluble in _________ solvents.
Define the functional group and complete the following table.
| S.I. No. | Functional Group | Compound | Formula |
| (1) | ______________ | _______________ |
C2H5OH |
| (2) | _______________ | _______________ | CH3CHO |
Number of valence electrons in a carbon atom is _______.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
 |
Which of the following are correct structural isomers of butane?
- \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - C - H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - H}\\
|\phantom{.....}|\phantom{.....}|\\
\ce{H}\ce{H-C-H}\ce{H}\\
|\\
\ce{H}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - H}\\
|\phantom{.....}\backslash\phantom{..}|\\
\phantom{....}\ce{H}\phantom{......}\ce{C - H}\phantom{}\\
\phantom{.......}|\\
\phantom{.......}\ce{H}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\\
\ce{H - C - C - H}\\
|\phantom{....}|\\
\ce{H - C - C - H}\\
|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\\
\end{array}\]
Mineral acids are stronger acids than carboxylic acids because
- mineral acids are completely ionised
- carboxylic acids are completely ionised
- mineral acids are partially ionised
- carboxylic acids are partially ionised
