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MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp -Block Elements (group 15-18)Previous Year Questions

In which on of the following arrangements the given sequence is not strictly according to the properties Indicated against it? (NEET 2021)

A.CO2<SIO2<SnO2<PbO2 :
B.HF<HCl<HBr<HI
C.H2O<H2S<H2Se<H2Te : Increasing pKa values✓ Correct
D.NH3<PH3<AsH3<SbH3 :Increasing acidic character
Explanation

Oxidising power : CO2 < SiO2 < SnO2 < PbO2 Acidic strength : HF<HCl<HBr<HI pKa : H2O<H2S<H2Se<H2Te Acidic strength : 1 pKa Acidic strength : NH3<PH3<AsH3<SbH3

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