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JEE Main 20211 SeptemberEvening Shift

Exam: JEE Main
Year: 2021
Date: 1 September
Shift: Evening Shift
Subject: Chemistry
Chapter: Chemical Bonding and Molecular Structure

JEE Main 2021 · 1 September · Evening Shift · Chemistry · Chemical Bonding and Molecular Structure

Number of paramagnetic oxides among the following given oxides is...

Number of paramagnetic oxides among the following given oxides is $___________ .$

${Li}_{2}O, CaO, {Na}_{2}{O}_{2}, {KO}_{2}, MgO$ and ${K}_{2}O$

Options

A $1$
B $3$
C $0$
D $2$

Correct answer

A. $1$

Step-by-step solution

Compound	Nature
${K}_{2}O$	diamagnetic
${Li}_{2}O$	diamagnetic
$MgO$	diamagnetic
$CaO$	diamagnetic
${Na}_{2}{O}_{2}$	diamagnetic
${KO}_{2}$	paramagnetic

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