First slide
Group-17 or Halogen family

Which reactions are used for the preparation of the halogen acid?


Correct (l) & (4) ;
HBr and HI cannot be prepared by heating Br or Iwith conc.H2SO4 because HBr and HI are strong reducing agents and reduces H2SO4 to SO2 and Br&Iions are oxidized to Br2 and I2 respectively.

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