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NEET · Chemistry · STD 12 - p -Block elements - ll

\(\mathrm{H}_{2} \mathrm{E}(\mathrm{E}=\mathrm{O}, \mathrm{S}, \mathrm{Se},   Te\) અને \(Po)\) માટે સાચો ઉષ્મીય સ્થિરતાનો ક્રમ નીચે આપેલામાંથી શોધો.

  1. A \(\mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{O} < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{Te} < \mathrm{H}_{2} \mathrm{Po}\)
  2. B \(\mathrm{H}_{2} \mathrm{O} < \mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{Te} < \mathrm{H}_{2} \mathrm{Po}\)
  3. C \(\mathrm{H}_{2} \mathrm{Po} < \mathrm{H}_{2} Te  < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{O}\)
  4. D \(\mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{Te} < \mathrm{H}_{2} \mathrm{Po} < \mathrm{H}_{2} \mathrm{O} < \mathrm{H}_{2} \mathrm{S}\)
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Correct Answer

(C) \(\mathrm{H}_{2} \mathrm{Po} < \mathrm{H}_{2} Te  < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{O}\)

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Detailed explanation

\(\mathrm{H}_{2} \mathrm{O} \quad \mathrm{H}_{2} \mathrm{S} \quad \mathrm{H}_{2} \mathrm{Se} \quad \mathrm{H}_{2} \mathrm{Te} \quad \mathrm{H}_{2} \mathrm{Po}\) \(\xrightarrow{\;\quad \quad \quad \;}\) Size of central atom increases, thermal stability decreases
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