Which is the correct thermal stablity order for H_ 2 E(E=O, S, Se…

MCQ

Which is the correct thermal stablity order for $\mathrm{H}_{2} \mathrm{E}(\mathrm{E}=\mathrm{O}, \mathrm{S}, \mathrm{Se}, \text { Te and Po) } ?$

A
$\mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{O} < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{Te} < \mathrm{H}_{2} \mathrm{Po}$
✓
$\mathrm{H}_{2} \mathrm{O} < \mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{Te} < \mathrm{H}_{2} \mathrm{Po}$
C
$\mathrm{H}_{2} \mathrm{Po} < \mathrm{H}_{2} Te < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{O}$
D
$\mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{Te} < \mathrm{H}_{2} \mathrm{Po} < \mathrm{H}_{2} \mathrm{O} < \mathrm{H}_{2} \mathrm{S}$

✓

Answer

Correct option: B.

$\mathrm{H}_{2} \mathrm{O} < \mathrm{H}_{2} \mathrm{S} < \mathrm{H}_{2} \mathrm{Se} < \mathrm{H}_{2} \mathrm{Te} < \mathrm{H}_{2} \mathrm{Po}$

b
$(A)$ $Pb _3 O _4$ is insoluble in water or do not react with water.

$(B)$ $2 KO _2+2 H _2 O \rightarrow 2 KOH + H _2 O _2+ O _{2( g )} \uparrow$

$(C)$ $Na _2 O _2+2 H _2 O \rightarrow 2 NaOH + H _2 O _2$

$(D)$ $Li _2 O _2+2 H _2 O \rightarrow 2 LiOH + H _2 O _2$

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