Solved: CHEMISTRY Question for NEET

NEET CHEMISTRYMedium

Which is the correct thermal stability order for $H_2E$ (E = O, S, Se, Te and Po)?

$H_2S < H_2O < H_2Se < H_2Te < H_2Po$

$H_2O < H_2S < H_2Se < H_2Te < H_2Po$

$H_2Po < H_2Te < H_2Se < H_2S < H_2O$

$H_2Se < H_2Te < H_2Po < H_2O < H_2S$

Step-by-Step Solution

On going down the group thermal stability order for $H_2E$ decreases because H-E bond energy decreases. Therefore, the order of stability is $H_2Po < H_2Te < H_2Se < H_2S < H_2O$ .

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