Q26 of 312 Page 263

Explain why, methanol is much more dangerous to drink than ethanol.

Unlike ethanol, intake of methanol in very small quantities can cause death. It is oxidised to methanal in the liver which reacts rapidly with protoplasm and coagulates it. Methanol also affects the optic nerve, causing blindness.

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26 How would you test for an alcohol? 26 Give the harmful effects of drinking alcohol. 27 How would you convert:

(a) ethanol into ethene?


(b) propanol into propanoic acid?


Name the process in each case and write the equations of the reactions involved.

 28 Give reasons for the following observations:

(a) Air holes of a gas burner have to be adjusted when the vessels being heated get blackened by the flame.


(b) Use of synthetic detergents causes pollution of water.