Suggest a chemical test to distinguish between ethanol and ethanoic acid and explain the procedure.

Two carbon compounds A and B have molecular formula C₃H₈ and C₃H₆ respectively. Which one of the two is most likely to show addition? Justify your answer.

Suggest a test to find the hardness of water and explain the procedure.

An organic compound 'X' with a molecular formula C₂H₆O undergoes oxidation with alkaline KMnO₄ and forms the compound Y', that has molecular formula C₂H₄O₂

a. Identify 'X' and 'Y'

b. Write your observation regarding the product when the compound 'X' is made to react with compound 'Y' which is used as a preservative for pickles.

Prepare models of methane, ethane, ethene and ethyne molecules using clay halls and match sticks.