Question
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it ?
Options :
HF < Hcl < HBr < HI : Increasing acidic strength
H2O < H2S < H2Se < H2Te : Increasing pKa values
NH3< PH3 < AsH3 < SbH3 : Increasing acidic character
CO2 < SiO2 < SnO2 < PbO2
Answer :
H2O < H2S < H2Se < H2Te : Increasing pKa values
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