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AP EAMCET201823 Apr 2018Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

Which of the following is not correct corresponding to chemistry of group 14 elements ?

Options

  1. ALead has no reaction with water due to formation of protective oxide layer
  2. BGeX ₂ is more stable than GeX ₄
  3. CPbX ₂ is more stable than PbX ₄
  4. DTin on reaction with steam liberates hydrogen.

Correct answer

B. GeX ₂ is more stable than GeX ₄

Step-by-step solution

Ge is the elements of group 14 (carbon family). In which Ge shows oxidation state +2 and +4 but +4 for Ge is more prominant while, due to sheilding of s -electrons by intervening d and f -electrons as the number of d and f electrons increases down the group from Ge to Pb the inert pair effect becomes more prominent so +4 oxidation state is becomes less stable. So, the +2 oxidation state of Pb X₂ are more stable.

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