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 ⟶ Na2HPO4 + H2O ; NaH2PO3 + NaOH ⟶ Na2HPO4 + H2O
Na2HPO4 + NaOH ⟶ Na3PO4 + H2O