A) \[{{H}_{2}}Te>{{H}_{2}}Se>{{H}_{2}}S>{{H}_{2}}O\]
B) \[{{H}_{2}}O>{{H}_{2}}S>{{H}_{2}}Se>{{H}_{2}}Te\]
C) \[{{H}_{2}}O>{{H}_{2}}Se>{{H}_{2}}Te>{{H}_{2}}S\]
D) \[{{H}_{2}}S>{{H}_{2}}O>{{H}_{2}}Se>{{H}_{2}}Te\]
Correct Answer: B
Solution :
[b]: Thermal stability decreases as the size of atom increases (down the group). Thus, \[{{H}_{2}}O\]is most stable and \[{{H}_{2}}\]Te is least stable.
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