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Assertion :Glycerol is purified by distillation under reduced pressure. Reason: Method of distillation under reduced pressure is used to purify liquids having very high boiling points and those, which decompose at or below their boiling point.
Assertion :Glycerol is purified by distillation under reduced pressure. Reason: Method of distillation under reduced pressure is used to purify liquids having very high boiling points and those, which decompose at or below their boiling point.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Distillation under reduced pressure → It is used to purify liquids having very high boiling points and those, which decompose at or below their boiling point.Glycerol, at normal pressure, the b.p. of glycerol is 563K but it decomposes on this temperature. Therefore, under reduced pressure of 12mmHg, glycerol can be distilled at 453K without decomposition.
Distillation under reduced pressure → It is used to purify liquids having very high boiling points and those, which decompose at or below their boiling point.
Glycerol, at normal pressure, the b.p. of glycerol is 563K but it decomposes on this temperature. Therefore, under reduced pressure of 12mmHg, glycerol can be distilled at 453K without decomposition.
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