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प्रश्न
How would you test for an alcohol?
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उत्तर
Alcohols are slightly acidic in nature and can be detected by their reaction with sodium. When sodium is added to alcohol, sodium alkoxide is formed along with the release of hydrogen gas that burns with a pop sound. This confirms that the compound is an alcohol. Alcohols do not change the colour of the litmus paper.
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संबंधित प्रश्न
Write the name and structural formula of the compound obtained when ethanol is heated at 443 K with excess of conc. H2SO4. Also write chemical equation for the reaction stating the role of conc. H2SO4 in it.
Give a balanced equation for the preparation of ethanol from monochloroethane and aq. sodium hydroxide.
How would you convert of thanol into ethene?
What happens when ethanol reacts with ethanoic acid in the presence of a little of concentrated sulphuric acid? Write equation of the reaction involved.
How is ethanol prepared by fermentation?
Give the lab. Prepared of methyl alcohol.
Name the product formed when ethanol reacts with acetic acid. Give an equation. What is the name given to this type of reaction?
An organic compound 'P' is a constituent of wine. 'P' on reacting with acidified K2Cr2O7 forms another compound 'Q'. When a piece of sodium is added to 'Q' a gas 'R' evolves which burns with a pop sound. Identify P, Q and R and write the chemical equations of the reactions involved.
Write a chemical reaction to show the dehydration of ethanol.
How is methane gas prepared in laboratory?
How will you carry out the following conversions:
(i) Ethanol to ethene
(ii) Bromoethane to ethanol
Name an organic compound which is dehydrated to produce ethene.
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.
How is ethanoic acid prepared from ethanol? Give the chemical equation.
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’.
Name the process.
What is the role of concentrated Sulphuric acid when it is heated with Ethanol at 443 K. Give the reaction involved.
What happens when ethanol is heated at 443K in the presence of conc. H2SO4? Write the role of conc. H2SO4 in this case.
Give the balanced chemical equation of the following reaction:
Combustion of ethanol
