Kelvi

Kelvi

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

medium

Classification of Elements and Periodicity in Properties

2021

chemistry

1.

HF < HCl < HBr < HI : Increasing acidic strength

2.

H $_2$ O $<$ H $_2$ S $<$ H $_2$ Se $<$ H $_2$ Te : Increasing $pK_a$ values

3.

NH $_3 <$ PH $_3 <$ AsH $_3 <$ SbH $_3$ : Increasing acidic character

4.

CO $_2 <$ SiO $_2 <$ SnO $_2 <$ PbO $_2$ : Increasing oxidizing power

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