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Question

Question: The thermal stability of hydrides of oxygen family is in order:...

The thermal stability of hydrides of oxygen family is in order:

A

H2Po < H2Te < H2Se < H2S < H2O

B

H2Po < H2O < H2Te < H2Se < H2S

C

H2S < H2O < H2Te < H2Se < H2Po

D

H2O < H2S < H2Te < H2Se < H2Po

Answer

H2Po < H2Te < H2Se < H2S < H2O

Explanation

Solution

Acid salts react with bases forming salts and water as per the reaction given below.

NaH2PO4 + NaOH \longrightarrow Na2HPO4 + H2O ; NaH2PO3 + NaOH \longrightarrow Na2HPO4 + H2O

Na2HPO4 + NaOH \longrightarrow Na3PO4 + H2O