An organic compound 'P' is a constituent of wine. 'P' on reacting with acidified `K_(2)Cr_(2)O_7` forms another compound 'Q'. When a piece of sodium is added to 'Q' a gas 'R' evolves which burns with a pop sound. Identify P,Q and R and write the chemical equations for the reactiono involved.

An organic compound 'A' is a constituent of wine and beer. This compound, on heating with alkaline potassium permanganate forms another organic compound 'B' which turns blue litmus to red. Identify the compound 'A' write the chemical equation of the reaction that takes place to form the compound 'B' Name the compound 'B'.

An organic compound 'X' on treatment with acidified K_(2)Cr_(2)O_(1) gives a compound 'Y' which reacts with I_(2) and sodium carbonate to form triodomethane. The compound 'X' could be

A carbon compound 'P' on heating with excess conc. H_(2)SO_(4) forms another carbon compound 'Q' which on addition of hydrogen in the presence of nickel catalyst forms a saturated carbon compound 'R'. One molecule of 'R' on combustion, forms two molecules of carbon dioxide and three molecules of water. Identify P, Q and R and write chemical equations for the reactions involved.

An organic compound X on treatement with acidified K_(2)Cr_(2)O_(7) gives a compound Y which reats with I_(2) and sodium carbonate to form tri-iodomethane. The compound X is

(a) On dropping a small piece of sodium in an organic compound 'A' with molecular formula C_(2)H_(6)O in a test tube, a brisk effervescence is observed. On bringing a burning splinter, the gas evolved burns with a pop sound. Identify 'A' and write the chemical equation. (b) What will happen when you heat the organic compound 'A' at 443 K with excess of concentrated sulphuric acid?