Advertisements
Advertisements
Question
Look at below figure and answer the following questions.
- What change would you observe in the calcium hydroxide solution taken in tube B?
- Write the reaction involved in test tubes A and B respectively.
- If ethanol is given instead of ethanoic acid, would you expect the same change?
- How can a solution of lime water be prepared in the laboratory?
Advertisements
Solution
- Calcium hydroxide solution taken in tube B becomes milky because of the formation of calcium carbonate.
- In test tube A, ethanoic acid reacts with sodium carbonate to give sodium acetate, water, carbon dioxide.
\[\ce{2CH3COOH + Na2CO3 -> 2CH3COONa + H2O + CO2}\]
In test tube B, when carbon dioxide is passed through lime water, it turns milky.
\[\ce{Ca(OH)2 + CO2 -> CaCO3 + H2O}\] - If ethanol is given instead of ethanoic acid, the same change would not be expected because ethanol does not react with sodium carbonate.
- Lime water is obtained on dissolving quick lime in water. A lot of heat is produced in this reaction.
\[\ce{CaO + H2O -> Ca(OH)2 + Heat}\]
APPEARS IN
RELATED QUESTIONS
Write a balanced chemical equation for Burning of ethane in the plentiful supply of air.
Organic compounds having
functional group are known as
Match the formulae in group A with appropriate names from group B:
Group A: CH3COOH, CH3CHO, CH3OH
Group B: Ethanol, Methanol, Ethanal, Ethanoic acid
Describe one reaction of ethanol.
What happens when ethanol is heated with concentrated sulphuric acid at 170°C? Write the equation of the reaction which takes place.
When ethanol is heated with concentrated sulphuric acid at 170°C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as:
(a) oxidising agent
(b) catalyst
(c) dehydrating agent
(d) reducing agent
Identify the functional group of the CH3COOH ?
Write the name and molecular formula of an organic compound having its name suffixed with 'ol' and having two carbon atoms in its molecule. Write balanced chemical equation to indicate what happens when this compound is heated with excess conc. H2SO4 and the name of main product formed. Also state the role of conc. H2SO4 in the reaction.
What is meant by a functional group in carbon compounds?
Write a chemical reaction to show the dehydration of ethanol.
Give the necessary conditions and equations of getting ethanol from:
(a) Alkyl halide
(b) An ethene
Give three uses of ethanol
Write a balanced chemical equation for the following:
Ethanol under high pressure and low temperature is treated with acidified potassium dichoromate.
What are the functional groups? Name any two compounds containing functional groups.
Generally _______ is called spirit.
Complete the following activity.
| Boiling point of ethanol | → | |
| General name of ethanol | → | |
| Use of ethanol | → | |
| Boiling point of ethanoic acid | → | |
| Melting point of pure ethanoic acid | → |
Dehydration of ethanol by conc. Sulphuric acid forms ______
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’.
What is denatured alcohol?
Give the balanced chemical equation of the following reaction:
Combustion of ethanol.
