Give a chemical test to distinguish between ethyl alcohol and methyl alcohol
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Solution:
(i) Tests
Methyl alcohol
Ethyl alcohol
1. Iodoform test
On heating with I2 and NaOH
m.aNo yellow compound is formed
e.aYellow compound with characteristic odour is formed
2. Oil of winter green test
On heating with salicylic acid and conc. H2SO4
m.aGives characteristic odour of oil of winter green.
e.aDoes not give odour of oil of winter green.
3. Easter test
On heating with glacial acetic and conc. H2SO4
m.aForms methyl acetate with characteristic odour.
e.aForms ethyl acetate which has fruity odour.
(ii) Tests
Ethyl alcohol
Chloroform
1. Iodoform test
On heating with I2 and NaOH
m.aYellow compound with characteristic odour is formed
e.aDoes not give the test.
2. Isocyanide test
On heating with aniline and alcoholic KOH
m.aNo reaction
e.aForms phenyl isocyanide which has a characteristic bad odour.
3. Solubility test
m.aIt is soluble in water.
e.aIt is insoluble in water.
m.a -methyl alcohol
e.a -ethyl alcohol
hope it helps ♡♡
(i) Tests
Methyl alcohol
Ethyl alcohol
1. Iodoform test
On heating with I2 and NaOH
m.aNo yellow compound is formed
e.aYellow compound with characteristic odour is formed
2. Oil of winter green test
On heating with salicylic acid and conc. H2SO4
m.aGives characteristic odour of oil of winter green.
e.aDoes not give odour of oil of winter green.
3. Easter test
On heating with glacial acetic and conc. H2SO4
m.aForms methyl acetate with characteristic odour.
e.aForms ethyl acetate which has fruity odour.
(ii) Tests
Ethyl alcohol
Chloroform
1. Iodoform test
On heating with I2 and NaOH
m.aYellow compound with characteristic odour is formed
e.aDoes not give the test.
2. Isocyanide test
On heating with aniline and alcoholic KOH
m.aNo reaction
e.aForms phenyl isocyanide which has a characteristic bad odour.
3. Solubility test
m.aIt is soluble in water.
e.aIt is insoluble in water.
m.a -methyl alcohol
e.a -ethyl alcohol
hope it helps ♡♡
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