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

Options

A. `HF lt HCl lt HBr lt HI` , increasing acidic strength
B. `H_(2)O lt H_(2)S lt H_(2)Se lt H_(2)Te`, increasing `pK_(a)` values
C. `NH_(3) lt PH_(3) lt AsH_(3) lt SbH_(3)` increasing acidic character
D. `CO_(2) lt SiO_(2) lt SnO_(2) lt PbO_(2)` ,increasing oxidizing power

Answer

B

Explanation

If acidic nature is high,`K_(a)` is high and `pK_(a)` p is low.
`H_(2)O lt H_(2)S lt H_(2)Se lt H_(2)Te` : Acidic nature (Order of Order of `K_(a)`)
`H_(2)O gt H_(2)S gt H_(2)Se gt H_(2)T` : Order of `pK_(a)` .