1
JEE Main 2025 (Online) 29th January Evening Shift
Numerical
+4
-1
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Total number of non-bonded electrons present in NO2$-$ ion based on Lewis theory is ______.

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2
JEE Main 2025 (Online) 22nd January Morning Shift
Numerical
+4
-1
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The number of molecules/ions that show linear geometry among the following is __________.

$\mathrm{SO}_2, \mathrm{BeCl}_2, \mathrm{CO}_2, \mathrm{~N}_3^{-}, \mathrm{NO}_2, \mathrm{~F}_2 \mathrm{O}, \mathrm{XeF}_2, \mathrm{NO}_2^{+}, \mathrm{I}_3^{-}, \mathrm{O}_3$

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3
JEE Main 2024 (Online) 9th April Evening Shift
Numerical
+4
-1
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Total number of electrons present in $$\left(\pi^*\right)$$ molecular orbitals of $$\mathrm{O}_2, \mathrm{O}_2^{+}$$ and $$\mathrm{O}_2^{-}$$ is ________.

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4
JEE Main 2024 (Online) 9th April Morning Shift
Numerical
+4
-1
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The total number of species from the following in which one unpaired electron is present, is _______.

$$\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$$

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