Q75 / 180 · NEET 2019 (All India) · Chemistry

Which is the correct thermal stability order for H2EE=O, S, Se, Te and Po?

  • A
    H2S<H2O<H2Se<H2Te<H2Po
  • B
    H2O<H2S<H2Se<H2Te<H2Po
  • Correct answer
    C
    H2Po<H2Te<H2Se<H2S<H2O
  • D
    H2Se<H2Te<H2Po<H2O<H2S

Solution

Thermal stability of H2E decreases with the decrease in bond dissociation enthalpy of H-E bond down the group.

H2O>H2S>H2Se>H2Te>H2Po

Hence, the correct answer is option: 'C'.

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