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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