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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
What is a covalent bond?

The covalent bond is said to be formed when two atoms achieve stability by sharing of an electron pair, each contributing one electron to the electron-pair. In this way, the atoms can be regarded as having acquired a noble gas configuration.

e.g.,


The covalent bond is said to be formed when two atoms achieve stabili

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Ethane, with the molecular formula C2H6 has:
  • 6 covalent bonds
  • 7 covalent bonds
  • 8 covalent bonds 
  • 8 covalent bonds 

B.

7 covalent bonds
399 Views

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that:
  • the food is not cooked completely
  •  the fuel is not burning completely
  • the fuel is wet
  •  the fuel is burning completely.

B.

 the fuel is not burning completely
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Butanone is a four-carbon compound with the functional group:
  • carboxylic acid
  • aldehyde
  • ketone 
  • alcohol.

C.

ketone 
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What would be the electron dot structure of carbon dioxide which has the formula CO2?

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What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur ? [Hint: The eight atoms of sulphur are joined together in the form of a ring.]



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