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10 ml of ethane gas is mixed with 40ml oxygen gas in an eudiometer tube at `30^@C` and fired such that complete reaction occurs. When the resulting gases are cooled to `30^@C`, the volume of eudiometer becomes 26ml. What is the vapour pressure of water at `30^@C`? Neglect the volume occupied by liquid water. Pressure is 1 atm and constant throughout.A. 1 atmB. 29.23 mm HgC. 26 mm HgD. 32.55 mm Hg |
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Answer» Correct Answer - B `{:(,C_(2)H_(6),+,7/2 O_(2),to,2CO_(2)(g),+,3H_(2)O(l)),(t=0,10 ml,,35 ml,,0,,0),(t=t,x,,"5 ml left",,20 ml,,):}` Volume of water vapoures =1 ml Pressure =`1/26xx760=29.23 mm Hg` |
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