17
Alcohol forms a homologous series with general formula $\ce{C_nH_{2n + 1}-OH}$ and $\ce{-OH}$ group as functional group. Ethanol is commonly called alcohol and is used in alcoholic drinks. It is good solvent, used in medicines, cough syrups, tonics etc.
(a) Write structural formula and name of 4th member of alcohol homologous series.
(b) What happens when ethanol is heated with alkaline $\ce{KMnO4}$ ? Write chemical equation involved.
(c) Write the chemical equation of reaction of ethanol with ethanoic acid in the presence of concentrated $\ce{H2SO4}$. Write the name of this reaction.
(a) Write structural formula and name of 4th member of alcohol homologous series.
(b) What happens when ethanol is heated with alkaline $\ce{KMnO4}$ ? Write chemical equation involved.
(c) Write the chemical equation of reaction of ethanol with ethanoic acid in the presence of concentrated $\ce{H2SO4}$. Write the name of this reaction.
Show SolutionHide Solution↓
(a) •
ce{CH3-CH2-CH2-CH2OH} /
H H H H
H-C-C-C-C-O-H
H H H H
• Butanol (1/2)
(b) • Ethanol gets oxidised to form ethanoic acid. (1/2)
(c) • alkaline
ce{KMnO4}+heat
ce{CH3-CH2-OH -> CH3COOH} (1/2)
•
ce{CH3-COOH + CH3-CH2OH <=>[Acid] CH3-C-O-CH2-CH3 + H2O} (1)
• Esterification reaction. (1)
OR
(c) • Ethanol will get dehydrated to form ethene. (1/2)
• alkaline
ce{KMnO4}+heat
ce{CH3-CH2-OH -> CH3COOH} (1/2)
(Award full marks if equation is written with condition)
• Dehydrating agent/ Catalyst (1)
ce{CH3-CH2-CH2-CH2OH} /
H H H H
H-C-C-C-C-O-H
H H H H
• Butanol (1/2)
(b) • Ethanol gets oxidised to form ethanoic acid. (1/2)
(c) • alkaline
ce{KMnO4}+heat
ce{CH3-CH2-OH -> CH3COOH} (1/2)
•
ce{CH3-COOH + CH3-CH2OH <=>[Acid] CH3-C-O-CH2-CH3 + H2O} (1)
• Esterification reaction. (1)
OR
(c) • Ethanol will get dehydrated to form ethene. (1/2)
• alkaline
ce{KMnO4}+heat
ce{CH3-CH2-OH -> CH3COOH} (1/2)
(Award full marks if equation is written with condition)
• Dehydrating agent/ Catalyst (1)