Question

A compound has molecular formula C2H4O2. Its 5% solution is used to prepare
pickles. (a)Identify this compound. (b) Write its functional group. (c) Which gas is
evolved when it reacts with sodium hydrogen carbonate? Write a balanced chemical
equation for it. (d)Name the compound formed when it reacts with C2H5OH.

Answer 1

Answer:

a)ethene

b) ketone

c)CO2,C2H4O2+NaOHCO3=CH3NaO+H2O+CO2

d)

Answer 2

Let us look at the answer:

Explanation:

The compound C₂H₄O₂ can be arranged as CH₃COOH, ethanoic acid commonly termed as acetic acid. Its 5% solution is used in households as preservatives termed as vinegar.

 (a) Ethanoic acid

 (b) Carboxylic acid

 (c) CH₃COOH + NaHCO₃----> CH₃COONa +H₂O +CO₂

     Carbon dioxide is liberated.

(d) CH₃COOH + C₂H₅OH -----> CH₃COOC₂H₅ +H₂O

   This reaction is called as esterification reaction. CH₃COOC₂H₅ methyl ethanoate a sweet smelling compound used in perfumes.