First slide
Chemical properties

Statement-I: f0H of H2O and H2S is negative.

Statement-II: TeO2 is a reducing agent


I) Thermal stability of H2O>H2S>H2Se>H2Te>H2Po. f0H of H2O and H2S is negative indicating their high thermal stability.

II) TeO2(Te+4) is an oxidizing agent because Te+4 has a great tendency to reduce to Te+2. Down the group lower oxidation states become stable.

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