Benzene to phenol in a single step My teacher told me we can convert benzene to phenol within a single step using $\ce{V2O5}$/ $\ce{O2}$ at 300 ⁰C (not 500 ⁰C). Later I searched for that reaction but I couldn't find it in all over Google except in Allen's Chemistry handbook. 

Does that reaction really occur and if it occurs then what is the mechanism of that reaction?
The reaction of benzene over $\ce{V2O5/ PtAu}$ catalyst at lower temperatures, can convert benzene  to phenol with some success.

See this book here Direct hydroxylation of benzene 

[The original question before editing was: What is the Ratta Maar Reaction?] Someone has played a prank with you with the named reaction. "Ratta maar" is a slang for "rote memorization" in Hindi/Urdu, which implies keep on memorizing without understanding and perhaps this is what your teacher wanted too. I assume this Allen's Chemistry Handbook is being taught or used in India.