Diazonium Salts — Prelims Questions

Which of the following reagents is used for the conversion of benzenediazonium chloride to chlorobenzene via the Sandmeyer reaction?

Aniline reacts with $NaNO_2$ and $HCl$ at $0-5^circ C$ to form compound A. Compound A, when treated with $HBF_4$ and then heated, yields compound B. Identify compound B.

Which of the following statements about diazonium salts is INCORRECT?

Which of the following compounds cannot be prepared from benzenediazonium chloride?

What is the product formed when benzenediazonium chloride reacts with $CH_3CH_2OH$?

Which of the following conditions is essential for the formation of an azo dye from benzenediazonium chloride and phenol?