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MATHS TALENT TEST SCORES RELEASED OVERALLS

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ALKANES AND ALKENES,ALKYNES

ALKANES:

  • these are also called paraffin.
  • alkanes are saturated hydrocarbons.
  • the formula of alkanes (CnH2n+2).
  • when the H atom is removed from the alkane then it is replaced by the name of alkyl.
  • the formula for alkyl is (Cn H2n+1).
  • the carbon atom in it shows the sp3 hybridization.
  • the bond length is equal to 1.54°A.

ALKENES:

  • these are also called as olefins means form oil products.
  • it possess a double bond between them.
  • the formula is (CnH2n).
  • the carbon atom in it shows the sp2 hybridization.
  • the bond length is equal to 1.34°A.

ALKYNES:

  • these are also called as acetylenes.
  • the formula for this is (Cn H2n-2).
  • the carbon atom in it possesses a triple bond and also shows the linear shape means it is in an sp hybridization.
  • the bond length is equal to 1.20°A.

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MOST IMPORTANT BITS FOR ECET

The most important bits for Ecet; all you can download for free chemistry imp bits: collected from most repeated and most important  chemistry 1 chemistry 2 chemistry 3 chemistry 4 chemistry 5
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THE HYBRIDISATION OF ORBITALS

HYBRIDISATION: it is a phenomenon, mixing up of two or more atomic orbitals of different energies and form an identical hybrid orbital. SP3 HYBRIDISATION: the shape of this molecule is tetrahydral shape. the bond angle is 109.28' this is formed by the combination of one S and 3P orbitals. four SP3 hybrid orbitals are formed. SP2 HYBRIDISATION: the shape of the molecule is planer triangular. the bond angle is 120°. this is formed by the combination of one S and 2P orbitals. three SP2 hybrid orbitals are formed. SP HYBRIDISATION: the shape of the molecule is linear. the bond angle is 180°. this is formed by the combination of S and P orbitals. two SP hybrid orbitals are formed.
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