halide

• NaCl in sulphuric acid 


  misty fumes

  HCl is produced
• NaBr in sulphuric acid 


  misty fumes

  brown vapour

  colourless gas

  HBr Br2 SO2 is produced
• NaI in sulphuric acid 


  Misty fumes HI

  purple vapour I2

  colourless gas SO2

  yellow solid S

  bad egg smell H2S