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

  • Option 1)

    H2O <H2S <H2Se < H2Te : increasing pKa values

  • Option 2)

    NH3 < PH3 < AsH3 < SbH3 : increasing acidic character

  • Option 3)

    CO2 < SiO2 < SnO2 < PbO2 : increasing oxidising power.

  • Option 4)

    HF < HCI < HBr < HI : increasing acidic strength

 

Answers (1)

pk_{a}  values should decrease with increasing acidity Acdic strength \alpha  stability of conjugate base H_{2} T_{e} < H_{2} S_{e} < H_{2}S< H_{2}O

in P K_{a}  values.


Option 1)

H2O <H2S <H2Se < H2Te : increasing pKa values

Correct option

Option 2)

NH3 < PH3 < AsH3 < SbH3 : increasing acidic character

Incorrect option

Option 3)

CO2 < SiO2 < SnO2 < PbO2 : increasing oxidising power.

Incorrect option

Option 4)

HF < HCI < HBr < HI : increasing acidic strength

Incorrect option

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