sulphur dioxide act as bleaching agent in moist conditions because of reducing nature of SO2
SO2 + 2H2O H2SO4 + 2H
COLOURED SUBSTANCE + H = COLOURLESS SUBSTANCE
Its dilute solution is also used as disinfectant.
It does not have linear shape. It has trigonal planar geometry and bent shape.
Hence the correct options are (i)and(iii)
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