In which of the following arrangements the given
sequence is not strictly according to the property
indicated against it ?
(1) NH3 < PH3 < AsHz < SbH3 :
increasing acidic character
(2) CO2 < SiO2 < SnO2 < PbO2 :
increasing oxidising power
(3) HF < HCI < HBr < HI :
increasing acidic strength
(4) H2O <H2S < H Se < H Te
29
increasing pk, values
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Answer:
the 3 is wrong because oxidizing power decreases down the group and here should HF should have the highest oxidizing power
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