Organic chemistry quiz 12:Chemical properties of alcohols. To : Detection of phenol

#1. Give reasons ? (1) Alcohols have a weak acidic character, although they have neutral effect on litmus.

a)Due to the pair of electrons which combines the hydrogen atom to the oxygen atom is shifted towards the oxygen atom this facilitates breaking down of covalent bond when alcohols react with active metals

b)Due to the pair of electrons which combines the hydrogen atom to the oxygen atom is shifted towards the hydrogen atom this facilitates breaking down of covalent bond when alcohols react with active metals

c)Due to the pair of electrons which combines the hydrogen atom to the oxygen atom is shifted towards the oxygen atom this facilitates breaking down of ionic bond when alcohols react with active metals

d) a and b

#2. (2) The formation of a white solid substance on evaporating the solution produced from the reaction of ethanol with sodium.

a)Due to formation of sodium ethoxide that is (wppt)

b)-due to formation of sodium pentoxide that is yellow ppt

c)due to formation of sodium ethoxide that is blue ppt

d)there is no correct answer

#3. (3) In the ester formation reaction, concentrated sulphuric acid should be added.

a)To remove water so the reaction moves towards formation of acid

b)To remove water so the reaction moves towards formation of ester

c)To remove hydrogen so the reaction moves towards formation of ester

d)a and c

Organic chemistry quiz 12:Chemical properties of alcohols. To : Detection of phenol

Results

#1. Give reasons ? (1) Alcohols have a weak acidic character, although they have neutral effect on litmus.

#2. (2) The formation of a white solid substance on evaporating the solution produced from the reaction of ethanol with sodium.

#3. (3) In the ester formation reaction, concentrated sulphuric acid should be added.