1.

Choose the correct oxidation number of sulphur in the compounds in column A from column B.  Column A  Column B Na2SO4 -2 H2SO3  +7 H2S +6 H2S2O7 +4

Answer»
  Column A  Column B
 Na2SO4 +6
 H2SO3  +4
 H2S -2
 H2S2O7 +7


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