BIOLOGY
CLASSIFICATION OF VITAMINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Lower temperature than its boiling point
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Higher temperature than its boiling point
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At its boiling point
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None of the above
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Detailed explanation-1: -Solution : In steam distillation, the mixture boils when the sum of vapour pressure of water and organic liquid becomes equal to the atmospheric pressure. Since the vapour pressure of water is appreciably higher than that of the organic liquid, it vaporises at a temperature much lower than its normal boiling point.
Detailed explanation-2: -An organic liquid vaporizes at a temperature its boiling point in steam distillation.
Detailed explanation-3: -As boiling occurs when the combined pressure matches the atmospheric pressure (let’s say 760torr for the sake of this calculation), boiling would occur below 100oC.
Detailed explanation-4: -Since P1<P2, organic liquid will vapourise at a lower temperature than its boiling point.