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States of Matter — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStates of Matter2 Marks
Question
Liquid ammonia bottle is cooled before opening the seal. Why?
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Answer

$\text{NH}_3$ is liquefied at high pressure, It is cooled so as to reduce pressure of gas inside the bottle so that it does not burst. If temperature is low, pressure will be low as $\text{P}\propto\text{T}$ at constant volume.

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