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JEE MainChemistryp Block Elements (Group 15, 16, 17 & 18)

Given below are two statements: Statement I : The O-O single bond is stronger and shorter than the S-S single bond. Statement II : The stability of the +6 oxidation state decreases down Group 16, whereas the stability of the +4 oxidation state increases. In the light of the above statements, choose the correct answer from the options given below.

Options

  1. AStatement I is true but Statement II is false
  2. BBoth Statement I and Statement II are true
  3. CBoth Statement I and Statement II are false
  4. DStatement I is false but Statement II is true

Correct answer

D. Statement I is false but Statement II is true

Step-by-step solution

Statement I is false. Although the O-O single bond is shorter than the S-S single bond due to the smaller atomic size of oxygen, it is weaker. The small size of the oxygen atom leads to strong interelectronic repulsions between the lone pairs on the adjacent oxygen atoms, which lowers the O-O single bond enthalpy compared to S-S. Statement II is true. Down Group 16, the stability of the higher oxidation state (+6) decreases and that of the lower oxidation state (+4) increases due to the inert pair effect. Therefore

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