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

HF < HCl < HBr < HI : Increasing acidic strength

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

NH $_3 <$ PH $_3 <$ AsH $_3 <$

CO $_2 <$ SiO $_2 <$ SnO $_2 <$

Explanation

To solve this problem, we need to analyze each option based on the given property. $\\$ Option 1: HF < HCl < HBr < HI : Increasing acidic strength $\\$ • The acidic strength of hydrogen halides increases down the group in the periodic table. $\\$ • This is because the bond strength decreases from HF to HI, making it easier to donate a proton. $\\$ • Therefore, this sequence is correct. $\\$ Option 2:

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