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प्रश्न
One of the following is not an allotrope of carbon. This is:
(a) diamond
(b) graphite
(c) cumene
(d) buckministerfullerene
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उत्तर
cumene
Cumene is not an allotrope of carbon. Allotropes of carbon are diamond, graphite and buckministerfullerene.
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संबंधित प्रश्न
Explain the bonding in methane molecule using electron dot structure.
Why are most carbon compounds poor conductors of electricity?
Name the element whose one of the allotropic forms is buckminsterfullerene.
State whether the following statement is true or false:
Diamond and graphite are the covalent compounds of carbon element (C)
Explain why, ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity.
Which inert gas does the Cl atom in HCl resemble in electron arrangement?
Draw the electron-dot structure of HCl compound and state the type of bonding.
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
Why are covalent compounds generally poor conductors of electricity?
An element L consists of molecules.
Why L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?
Fill in the blank and rewrite the completed statement:
Covalent compounds are generally soluble in _________ solvents.
The bond between two oxygen atoms is _______ bond.
Write the molecular formula of the given compound.
Acetic acid
The number of electrons in the valence shell of a carbon atom is 4.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{.........}\ce{H}\\ \phantom{.........}|\\ \ce{H - C ≡ C - C - H}\\ \phantom{.........}|\\ \phantom{.........}\ce{H} \end{array}\] |
Give an example for each of the following statement.
Formation of coordinate covalent bond between NH3 ➝ BF3 molecules
The number of pi-bonds present in benzoic acid molecule are ______.
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
Molecular reactions are ______ in the covalent compound.
Explain dipole (polar) molecule by taking hydrogen chloride as an example.
