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प्रश्न
How would you bring about the following conversions? Name the process and write the reaction involved.
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
Name the compound formed when ethanol is heated in excess of conc. sulphuric acid at 443 K. Also, write the chemical equation of the reaction stating the role of conc. sulphuric acid in it. What would happen if hydrogen is added to the product of this reaction in the presence of a catalyst such as palladium or nickel?
Give a balanced equation for the preparation of ethanol from monochloroethane and aq. sodium hydroxide.
............ is a functional group of the alcohol.
How would you convert of thanol into ethene?
One of the following substances is not added to make denatured alcohol. This is:
(a) methyl alcohol
(b) copper sulphate
(c) chloroform
(d) pyridine
Which of the following can damage optic nerve leading to blindness, if taken internally?
(a) CH3COOH
(b) C2H5OH
(c) NaHCO3
(d) CH3OH
Consider the following organic compound:
CH3OH, C2H5OH, CH3COCH3, CH3COOH, C2H5COOH, C4H9COOC2H5, CH4, C2H6, CH3CHO, HCHO
Out of these compound:
Which compound is used to sterilise wounds and syringes?
[Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol]
From the above, name the compound with \[\ce{-COOH}\] as part of its structure.
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.
(i) How is a 5% solution of KMnO4 prepared?
(ii) State the role of alkaline potassium permanganate in this reaction. What happens on adding it in excess?
(iii) Write the chemical equation of this reaction.
How is ethene prepared from ethanol? Give the reaction involved in it.
