Which is the correct thermal stability order for H2E (E = O. S. Se. Te and Po) ?

Question

Which is the correct thermal stability order for H2E (E = O. S. Se. Te and Po) ? (A) H2Po < H2Te< H2Se < H2S < H2O (B) H2Se < H2Te< H2Po < H2O < H2S (C) H2S < H2O < H2Se < H2Te< H2 Po (D) H2O < H2S < H2Se < H2Te < H2Po

Tardigrade Admin · Accepted Answer

On going down the group thermal stability order for H2 E decreases because H-E bond energy decreases ∴ Order of stability would be:- H2 Po < H2 Te < H2 Se < H2S < H2 O

Q. Which is the correct thermal stability order for $H_{2} E$ (E = O. S. Se. Te and $P o$ ) ?

$H_{2} P o < H_{2} T e < H_{2} S e < H_{2} S < H_{2} O$

$H_{2} S e < H_{2} T e < H_{2} P o < H_{2} O < H_{2} S$

$H_{2} S < H_{2} O < H_{2} S e < H_{2} T e < H_{2} P o$

$H_{2} O < H_{2} S < H_{2} S e < H_{2} T e < H_{2} P o$

On going down the group thermal stability order for $H_{2} E$ decreases because H-E bond energy decreases
$∴$ Order of stability would be:-
$H_{2} P o < H_{2} T e < H_{2} S e < H_{2} S < H_{2} O$

Q. Which is the correct thermal stability order for H2​E (E = O. S. Se. Te and Po) ?

H2​Po<H2​Te<H2​Se<H2​S<H2​O

H2​Se<H2​Te<H2​Po<H2​O<H2​S

H2​S<H2​O<H2​Se<H2​Te<H2​Po

H2​O<H2​S<H2​Se<H2​Te<H2​Po