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Monday, October 22, 2012

14. Alcohol prepared by the distillation of wood is :

(A) Propyl Alcohol
(B) Methyl Alcohol
(C) Ethyl Alcohol
(D) Glycerol

Ans. (B) Methyl Alcohol

Wood alcohol is Methanol or Methyl Alcohol. It was originally made by the destructive distillation of wood in the absence of oxygen (pyrolysis).

Ethanol or Ethly alcohol is usually derived by fermenting grain and then distilling out the alcohol. This alcohol is also drinkable as wine, beer, and distilled spirits.

Propyl Alcohol is formed as a by-product of the synthesis of methanol (methyl alcohol) from carbon monoxide and hydrogen.

Glycerol  occurs as glycosides in almost all animal and vegetable oils and fats and used in Cosmetics like Propyl Alcohol.


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