Chemistry - Complete s-block Question with Solution | TestHub

ChemistryComplete s-blocks-block IAEasy2 minPYQ_2020

ChemistryEasysingle choice

Salt $A + S ⟶ B \overset{{BaCl}_{2}}{⟶}$ White ppt.

A is paramagnetic in nature and contains about 55% potassium. Thus A is :

Options:

Answer:

Solution:

$\begin{matrix} 2 {KO}_{2} + S & \overset{Δ}{\to} & K_{2} {SO}_{4} \\ K_{2} {SO}_{4} & \overset{{BaCl}_{2}}{\to} & {BaSO}_{4} \\ (White precipitate) \end{matrix}$

In ${KO}_{2} \to O_{2}^{-}$ due to unpaired electron in $π^{*} (ABMO)$ is paramagnetic as per MOT.

KO₂ $\Rightarrow$ % of K is $\frac{39}{71} \times 100 = 55% w/w basis$

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Complete s-blockSubtopic:s-block IA

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...