Some Important Carbon Compounds – Ethanol and Ethanoic acid
1. 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 it is heated with excess of conc. H2S04 and the name of main product formed. Also state the role of conc. H2S04 in the reaction.
(3 marks) (Foreign 2016)
Submit your answer here and also get answer of the question via e-mail –
2. 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.
(3 marks) (Foreign 2016)
Submit your answer here and also get answer of the question via e-mail –
3. List two tests for experimentally distinguishing between an alcohol and a carboxylic acid and describe how these tests are performed.
(3 marks) (AI 2015)
Need Clues – Click here
Submit your answer here and also get answer of the question via e-mail –
4. What are esters? How they are prepared? List two uses of esters.
(3 marks) (Delhi 2014)
Need Clues – Click here
Submit your answer here and also get answer of the question via e-mail –
5. A carboxylic acid (molecular formula C2H4O2) reacts with an alcohol in the presence of an acid catalyst to farm a compound ‘X’. The alcohol on oxidation with alkaline KMnO4 followed by acidification gives the same carboxylic acid C2H4O2. Write the name and structure of –
(i) carboxylic acid, (ii) alcohol and (iii) the compound ‘X’.
(3 marks) (AI 2014)
Submit your answer here and also get answer of the question via e-mail –
6. Write the chemical equation to explain what happens when ethanol is heated with alkaline solution of potassium permanganate. Mention two physical properties and two uses of ethanol.
(3 marks) (Foreign 2014)
Submit your answer here and also get answer of the question via e-mail –
7. Write chemical equations to describe two examples of different oxidations of ethanol. List two uses of ethanol.
(3 marks) (Foreign 2014)
Submit your answer here and also get answer of the question via e-mail –
8. Write the chemical equations to show what happens when
(i) sodium hydroxide is added to ethanoic acid?
(ii) solid sodium hydrogen carbonate is added to ethanoic acid?
(iii) ethanol reacts with sodium?
(3 marks) (Foreign 2014)
Submit your answer here and also get answer of the question via e-mail –
9. Write the chemical equations for what happens when
(i) sodium metal is added to ethanoic acid?
(ii) solid sodium carbonate is added to ethanoic acid?
(iii) ethanoic acid reacts with dilute solution of sodium hydroxide?
(3 marks) (AI 2011)
Submit your answer here and also get answer of the question via e-mail –
10. (a) Distinguish between esterification and saponification reactions of organic compounds.
(b) With a labelled diagram describe an activity to show the formation of an ester.
(3 marks) (AI 2009)
Submit your answer here and also get answer of the question via e-mail –
11. (a) The structural formula of an ester is –
Write the structural formulae of the corresponding alcohol and the acid.
(b) (i) Mention experimental conditions involved in obtaining ethene from ethanol.
(ii) Write the chemical equation for the above reaction.
(3 marks) (3/5 , Foreign 2009)
Submit your answer here and also get answer of the question via e-mail –
12. A carbon compound ‘P’ on heating with excess conc. H2SO4 forms another carbon compound ‘Q’ which on addition of hydrogen in the presence of nickel catalyst forms a saturated carbon compound ‘R’. One molecule of R on combustion forms two molecules of carbon dioxide and three molecules of water. Identify P, Q and R and write chemical equations for the reactions involved.
(5 marks) (AI 2016)
Submit your answer here and also get answer of the question via e-mail –
13. List in tabular form three physical and two chemical properties on the basis of which ethanol and ethanoic acid can be differentiated?
(5 marks) (Delhi 2012)
Submit your answer here and also get answer of the question via e-mail –
14. (a) In a tabular form, differentiate between ethanol and ethanoic acid under the following heads –
(i) Physical state (ii) Taste
(iii) NaHCO3 test (iv) Ester test
(b) Write a chemical reaction to show the dehydration of ethanol.
(5 marks) (Delhi 2011)
Submit your answer here and also get answer of the question via e-mail –
Next –
Previous Year’s CBSE Board Questions – Soap and Detergent
Pingback: Some Important Carbon Compounds -Ethanol and Ethanoic acid – Freakgenie