wt is the action of the following reagents on but-1-ene

bromine

cold and dilute alkaline KMnO₄

 CH₃CH₂CH=CH₂ + Br₂ →CH₃CH(Br)CH=CH₂

    Butene   3-bromo butane

   CH₃CH₂CH=CH₂  [O] + H₂O    CH₃CH₂CH(OH)CH₂(OH)

  But-1-ene  But-1,2-diol