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0 votes
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in Chemistry by (35.0k points)

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it ?

(1) HF < HCl < HBr < HI : Increasing acidic strength

(2) H2O < H2S < H2Se < H2Te : Increasing pKa values

(3) NH3 < PH3 < AsH3 < SbH3 : Increasing acidic character

(4) CO2 < SiO2 < SnO2 < PbP2 : Increasing oxidizing power

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1 Answer

+1 vote
by (31.3k points)

Correct answer is (2).

Down the group acidic strength increases So pKa value decreases.

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