What happens when a small piece of sodium is dropped into ethanol?

Explain the structure of graphite in ten of bonding and give one property based on this structure.

Name the acid present in vinegar.

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.