Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?
Correct answer: B. N-hexane
- A. acetylene
- B. N-hexane
- C. Benzene sulphonic acid
- D. Sodium benzoate
Explanation
N-hexane undergoes catalytic dehydrocyclisation, losing hydrogen and forming a six-membered aromatic ring, benzene. The catalyst mixture is typically chromium oxide, aluminium oxide and silica at about 500 C. The likely mistake is acetylene, which forms benzene by cyclotrimerisation using a different preparation route and catalyst.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
Practise Chemistry of Hydrocarbons
1,093 free Chemistry of Hydrocarbons MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Benzene and Aromatic Compounds questions
Which is fused cyclic aromatic compound _____________________?
Benzene does not undergo___________________?
Nitronium ion is___________________?
By which method the molecular mass of benzene was determined as 78.108 ?
Nitration of chlorobenzene gives___________________?
The hydrolysis of Benzenetrizonide will yield three moles of____________________?