At \( 273 \mathrm{~K} \) and 1 atm, 10 litre of \( \mathrm{N}_{2} \mathrm{O}_{4} \) decomposes t...

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At \( 273 \mathrm{~K} \) and 1 atm, 10 litre of \( \mathrm{N}_{2} \mathrm{O}_{4} \) decomposes to \( \mathrm{NO}_{2} \) according to equation
N2O4(g)⇌2NO2(g)
What is degree of dissociation \( (\alpha) \) when the original volume is \( 25 \% \) less than that of existing volume?
(a) \( 0.25 \)
(b) 0.33
(c) \( 0.66 \)
(d) \( 0.5 \)
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