The formulae of four organic compounds are given below: A B C D C2H4 CH3COOH C2H5OH C2H6(i) Which one of these compounds A, B, C or D is a saturated hydrocarbon? (ii) Identify the organic acid and give its structural formula.(iii) Which of the above compounds when heated at 443K in the presence of concentrated H2SO4 forms ethene as the major product? What is the role played by concentrated H2SO4 in this reaction? Also write the chemical equation involved.(iv) Give a chemical equation when B and C react with each other in presence of concentrated H2SO4. Name the major product formed and mention one of its important use.
Answers
Answer:
The compounds that are included in the question are:
Compound A: C2H4 - Ethylene or Ethene
Compound B: CH3COOH – Acetic acid
Compound C: C2H5OH – Ethyl alcohol
Compound D: C2H6 – Benzene
1) Out of the compounds A, B, C, D, Compound D or benzene is an example of saturated hydrocarbon.
2) Out of the above compounds, Compound B or acetic acid is an organic acid with the structural formula of
3) When Ethyl alcohol reacts with concentrated sulfuric acid at 443K it forms ethene as one of the products. In this reaction sulfuric acid acts like a catalysts and dehydrating agent.
The following reaction takes place:
C2H5OH + conc. H2SO4 -------> C2H4 + H2O
4) When ethyl alcohol reacts with acetic acid in the presence of the catalyst, sulfuric acid, it leads to an esterification reaction. The ester product that is formed is known as ethyl ethanoate as follows:
Ethyl ethanoate is a small ester molecule that has a sweetish odor and is used in perfumes, pharmaceuticals or flavorings.
ANSWER:
1. compound D is a saturated hydrocarbon.
2. CH3COOH is the organic acid.
3. C2H5OH-h2so4 play as a catalyst in the reaction