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प्रश्न
Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity?
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उत्तर
Graphite is a good conductor of electricity because of the presence of free electrons in its crystal. As we know that an atom of carbon has 4 valence electrons, in a graphite crystal, each carbon atom is connected to only three other carbon atoms by covalent bonds. This means that the fourth valence electron of each carbon atom is free. These free moving electrons are responsible for the conduction of electricity in a graphite crystal. But in the case of diamond these free electrons are not available due to its structure. Hence, diamond is a non-conductor.
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संबंधित प्रश्न
Explain why carbon forms compounds mainly by covalent bond.
Explain the nature of the covalent bond using the bond formation in CH3Cl.
Why are most carbon compounds poor conductors of electricity?
Give one example of a molecule containing a double covalent bond
What type of chemical bonds are formed by carbon? Why?
How will you find out which of the water soluble compound A or B is ionic?
Draw the electron-dot structure of HCl compound and state the type of bonding.
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
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
Distinguish between ionic and covalent compounds under the following properties:
(i) Strength of forces between constituent elements
(ii) Solubility of compounds in water
(iii) Electrical conduction in substances
The following structural formula belongs to which carbon compound?
Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.
The particles present in strong electrolytes are
Give an example of the covalent bond formed by
(i) Similar atoms (ii) Dissimilar atoms
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc}\phantom{......}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\ \phantom{.....}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C = C}\\\phantom{.....}|\phantom{.........}|\\ \phantom{.....}\ce{H}\phantom{........}\ce{H}\end{array}\] |
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Which of the following is the purest form of carbon?
Two carbon atoms can always form one or two covalent bonds.
The electron dot structure of chlorine molecule is:
