Question

When n-hexane is heated to 773K at 10-20 atmosphere pressure in the presence of \(Cr_2O_3\), benzene is formed. This reaction is called

• A. pyrolysis
• B. refining
• C. reforming
• D. cracking
• E. isomerisation

Hint:

Catalytic reforming is crucial in modern refineries to improve the quality and efficiency of fuel production.

Answer 1

The Correct Option is C

Step 1: The process of converting alkanes into aromatics or cyclic hydrocarbons by dehydrogenation and isomerization under high temperature and pressure is known as catalytic reforming. 
Step 2: \(Cr_2O_3\) serves as a catalyst in this reaction, facilitating the rearrangement and dehydrogenation necessary to transform n-hexane into benzene. 
Step 3: The conditions described (773K and 10-20 atmospheres) are typical for a reforming process, which aims to increase the octane number of gasoline. 
Step 4: Therefore, the conversion of n-hexane to benzene under these conditions is best described as reforming.