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P Block Elements question

2019 · Q81
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P Block Elements question

2019 · Q81

NEETChemistryP Block ElementsMCQ+4 / −1
Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po)?
  1. A
    H2Po < H2Te < H2Se < H2S < H2O
  2. B
    H2Se < H2Te < H2Po < H2O < H2S
  3. C
    H2S < H2O < H2Se < H2Te < H2Po
  4. D
    H2O < H2S < H2Se < H2Te < H2Po
View written solutionFree

Correct answer: A

The thermal stability of hydrides decreases down the group due to decrease in bond dissociation energy down the group.

Therefore, thermal stability order will be :

H2Po < H2Te < H2Se < H2S < H2O

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