Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of:

  • A
    two ethylenic double bonds
  • B
    a vinyl group
  • C
    an isopropyl group
  • D
    an acetylenic triple bond

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Assertion : $trans-2-Butene$ on reaction with $Br_2$ gives $meso-2,3-dibromobutane$.
Reason : The reaction involves $syn-addition$ of bromine.

Which reaction is known as the addition of dihydrogen to an alkene? Explain briefly.

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