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.
Found an issue with this question?
Related Questions
More from p-Block Elements
More from 2019
A chemical reaction : A + B ⟶ AB, B is acting as limiting reagent then choose the correct option. The limiting reagent is:
StoichiometryChemistry
Variations caused by mutation, as proposed by Hugo de Vries, are:
EvolutionBotany
In case of paper chromatography, there are both stationary and dynamic phases present. So, the statement that it is a stationary phase is incorrect.
ChromatographyChemistry