MCQ
The configuration $1{s^2},\,2{s^2}2{p^5},\,3{s^1}$ shows
- AExcited state of $O_2^ - $
- ✓Excited state of neon
- CExcited state of fluorine
- DGround state of fluorine atom
The excited neon configuration is $1{s^2}2{s^2}2{p^5}3{s^1}$.
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Gases
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$\ce{H_2}$
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$\ce{He}$
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$\ce{O_2}$
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$\ce{n_2}$
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Critical temperature in Kelvin
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$33.2$ | $5.3$ | $154.3$ | $126$ |

In an experiment, $2.0$ $moles$ of $NOCl$ was placed in a one-litre flask and the concentration of NO after equilibrium established, was found to be $0.4$ $mol / L$. The equilibrium constant at $30^{\circ} C$ is $.......\times 10^{-4}$