NEET2019Chemistry-p-Block Elements
NEET 2019 Chemistry Group 16 Elements MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which is the CORRECT thermal stability order for H₂E (E = O, S, Se, Te and Po)?
A
H₂O < H₂S < H₂Se < H₂Te < H₂Po
B
H₂Po < H₂Te < H₂Se < H₂S < H₂O
C
H₂Se < H₂Te < H₂Po < H₂O < H₂S
D
H₂S < H₂O < H₂Se < H₂Te < H₂Po
Correct Answer
Option B
Detailed Explanation
Thermal stability decreases down the group due to increasing atomic size and weaker E⁻H bond.
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