Which compound is formed when phenol reacts with dilute HNO₃?
Phenol reacts with dilute HNO₃ to form a mixture of 2-nitrophenol and 4-nitrophenol, with 2-nitrophenol being a significant product due to ortho-para directing effect of -OH.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Phenols and Ethers - Williamson and Other Methods