(নিঃসরণ,ব্যাপন,পাতন, উর্ধ্বপাতন)। English and Bangla
The passage of gases from a region of high pressure to region of low pressure through fine proes is called effusion.
If a solid is directly converted to gas on heating and the gas is directly converted to solid on cooling, this process is called sublimation.
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