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प्रश्न
How would you bring about the following conversions? Name the process and write the reaction involved.
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उत्तर
- When ethanol is heated at 443 K with excess concentrated sulphuric acid, it gives ethene.
\[\ce{C2H5OH \overset{CONC.H2SO4}{->} C2H4 + H2O}\]
This process is known as dehydration because concentrated sulphuric acid is a dehydrating agent which removes water from ethanol. - When propanol is treated with alkaline potassium permanganate or acidified potassium dichromate, it is converted to propanoic acid.
\[\ce{CH3CH2CH2OH \overset{Alkaline KMnO3}{->}CH3CH2COOH}\] - Alkaline KMnO4 or acidified K2Cr2O7 is an oxidising agent which is adding oxygen to propanol. Hence, it is an oxidation reaction.
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संबंधित प्रश्न
Give the structural formula of ethanol.
Fill in the following blank with suitable word.
The functional group present in ethanol is ...............
Draw the structures for the following compounds:
Propanal
Complete the following equation:
`CH_3 CH_2 OH` 
State two used of ethanol (other than as a fuel).
How is ethanol prepared by fermentation?
What is the effect of ethanol on the human body?
Give the necessary conditions and equations of getting ethanol from:
(a) Alkyl halide
(b) An ethene
Give three uses of ethanol
The product formed when ethene gas reacts with water in the presence of sulphuric acid is ______.
The organic compound obtained as the end product of the fermentation of a sugar solution is ______.
Answer the following question.
Why is the conversion of ethanol to ethanoic acid considered an oxidation reaction? Write the oxidizing agent used in the reaction involved.
3 mL of ethanol is taken in a test tube and warmed gently in a water bath. A 5% solution of alkaline potassium permanganate is added to the first drop by drop to this solution, then in excess.
- How is a 5% solution of KMnO4 prepared?
- State the role of alkaline potassium permanganate in this reaction. What happens on adding it in excess?
- Write the chemical equation of this reaction.
C2H5OH + 3O2 → 2CO2 + 3H2O is a ______
An organic compound ‘A’ is widely used as a preservative and has the molecular formula C2H4O2. This compound reacts with ethanol to form a sweet-smelling compound ‘B’.
Write the chemical equation for its reaction with ethanol to form compound ‘B’.
The organic compounds having functional group are known as ______.
What is denatured alcohol?
Give the balanced chemical equation of the following reaction:
Combustion of ethanol.
Give the balanced chemical equation of the reactions.
Neutralization of NaOH with ethanoic acid.
Give the balanced chemical equation of the following reaction:
Oxidation of ethanol by acidified potassium dichromate.
