What is prepared by the Fischer-Tropsch method?

Vinegar is a solution of :

On dropping a small piece of sodium in a test tube containing carbon compound $X$ with molecular formula $C_{2}H_{6}O$,a brisk effervescence is observed and a gas $Y$ is produced. On bringing a burning splinter at the mouth of the test tube,the gas evolved burns with a pop sound. Identify $X$ and $Y$. Also,write the chemical equation for the reaction. Write the name and structure of the product formed when you heat $X$ with excess concentrated sulphuric acid.

Ethanoic acid can be obtained from ethanol by the process of:

Which of the following compounds has a sweet,fruity smell?

In the modern industrial method for the production of ethanol, hydration of ethene is carried out in the presence of which substance?