Question
Chemistry Question on p -Block Elements
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it
A
CO2 < SiO2 < SnO2 < PbO2 :Increasing oxidizing power
B
HF < HCl< HBr < HI:Increasing acidic strength
C
H2O < H2S< H2Se < H2Te:Increasing pKa values
D
NH3 < PH3< AsH3 < SbH3:Increasing acidic character
Answer
H2O < H2S< H2Se < H2Te:Increasing pKa values
Explanation
Solution
The correct answer is option (C) : H2O < H2S< H2Se < H2Te:Increasing pKa values