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22/09/2021 1:50 pm
Topic starter
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?
(1) HF < HCl : Increasing acidic
< HBr < HI strength
(2) H2O < H2S : Increasing pKa
< H2Se < H2Te values
(3) NH3 < PH3 : Increasing
< AsH3 < SbH3 acidic character
(4) CO2 < SiO2 : Increasing
<SnO2 < PbP2 oxidizing power
1 Answer
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22/09/2021 1:53 pm
Correct answer: (2) H2O < H2S : Increasing pKa
< H2Se < H2Te values
Explanation:
H2O < H2S < H2Se < H2Te
Down the group acidic strength increases
So pKa value decreases