The 'middle oil' fraction of coal tar distillation contains

Which of the following compounds does not undergo the Friedel-Crafts reaction?

How many benzylic hydrogens are present in the hydrocarbon shown below?

Which of the following is/are produced when a mixture of benzene vapour and oxygen is passed over $V_2O_5$ catalyst at $775\, K$?

In electrophilic aromatic substitution reaction,the nitro group is meta-directing because it

Which one of the following reactions does $NOT$ give benzene as the product?