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प्रश्न
Why does carbon form compounds mainly by covalent bonding?
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उत्तर
Carbon has the property of tetravalency, so it mainly forms covalent bonds. Since carbon is an element with atomic number 6, its electronic configuration is (2,4). This means there are 4 valence electrons in its outermost shell, and it can either gain 4 electrons or lose 4 electrons to attain the inert gas configuration for becoming stable. As the atoms of carbon are of extremely small size, the nucleus exerts a great force of attraction on the outermost electrons to hold them tightly. This makes it difficult to remove or add electrons to its structure. Therefore, it attains the inert gas configuration by the sharing of electrons in the outermost shell. As the inert gas configuration is attained by the sharing of electrons, carbon forms compounds always by covalent bonding.
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संबंधित प्रश्न
Give reason why carbon compounds are generally poor conductors of electricity.
State whether the following statement is true or false:
Diamond and graphite are the covalent compounds of carbon element (C)
Fill in the following blank with suitable word:
The form of carbon which is known as black lead is ...........
Give one example of a molecule containing a single covalent bond.
Explain why, ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity.
Which inert gas does the H atom in HCl resemble in electron arrangement?
Draw the electron-dot structure of H2O compound and state the type of bonding.
Draw the electron-dot structure of N2 and state the type of bonding.
Explain why, graphite can be used as a lubricant but diamond cannot.
Two non-metals combine with each other by the sharing of electrons to form a compound X.
(a) What type of chemical bond is present in X?
(b) State whether X will have a high melting point or low melting point.
(c) Will it be a good conductor of electricity or not?
(d) Will it dissolve in an organic solvent or not?
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
Define a coordinate bond.
Draw all possile structural formulae of compound from their molecular formula given below.
C3H4
Explain the following term with example.
Alkane
Give examples for the following:
Two gaseous polar compounds.
Explain why Carbon tetrachloride does not dissolve in water.
Give an example for each of the following statement.
Formation of coordinate covalent bond between NH3 ➝ BF3 molecules
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
Statement (A): Covalent compounds are bad conductors of electricity.
Reason (B): Covalent compounds contain charged particles (ions)
The electron dot structure of chlorine molecule is:
