Wurtz, Kolbe and decarboxylation products from drawn precursors

14 questions on Wurtz, Kolbe and decarboxylation products from drawn precursors from the Hydrocarbons chapter: 3 NEET level, 5 JEE Main, 6 JEE Advanced. Each one opens with its answer and solution.

• The alkyl bromide shown is treated with sodium metal in dry ether. Which structure is the main organic product? NEET level, drawn structure
• The sodium salt shown is heated strongly with soda lime (NaOH and CaO). Which hydrocarbon is formed? NEET level, drawn structure
• A concentrated aqueous solution of the sodium salt shown is electrolysed (Kolbe electrolysis). Which hydrocarbon collects at the anode? NEET level, drawn structure
• The dibromide shown is heated with sodium in dry ether. Which structure is the product? JEE Main level, drawn structure
• The bromoalkane shown is mixed with bromomethane and 1-bromopropane and treated with sodium in dry ether. Assume all coupling combinations occur and ignore alke... JEE Advanced level, drawn structure
• An aqueous solution of the disodium salt shown is electrolysed. Which hydrocarbon is liberated at the anode? JEE Main level, drawn structure
• The carboxylic acid shown is converted to its sodium salt and heated with soda lime. Which structure is the hydrocarbon formed? JEE Main level, drawn structure
• A concentrated aqueous solution of the sodium salt shown is electrolysed between inert electrodes. Which statements are correct? JEE Main level, drawn structure
• The sodium salt shown is mixed with sodium ethanoate and the mixture is electrolysed (Kolbe). Which of the following alkanes is NOT formed? JEE Advanced level, drawn structure
• The sodium salt shown is subjected to (i) heating with soda lime and (ii) Kolbe electrolysis in aqueous solution. Which statements are correct? JEE Advanced level, drawn structure
• The dibromide shown is treated with sodium in dry ether, and the organic product is examined by ^1H NMR. How many signals does the product show? JEE Advanced level, drawn structure
• The dihalide shown is heated with sodium in dry ether. Which statements are correct? JEE Main level, drawn structure
• The bromoalkane shown is treated with sodium in dry ether and gives the coupled alkane. How many stereoisomers does this coupled alkane have (count the meso for... JEE Advanced level, drawn structure
• The aryl bromide shown is mixed with bromomethane and treated with sodium in dry ether (Wurtz-Fittig conditions). How many distinct coupled products are possibl... JEE Advanced level, drawn structure