Which of the following options is correct regarding the property of benzene diazonium fluoroborate?

It is water-insoluble and stable at room temperature

The correct answer is option 2. It is water-insoluble and stable at room temperature.

Diazonium salts two nitrogen atoms with one being charged. Some examples of these salts are Benzenediazonium chloride, benzene diazonium hydrogen sulfate, benzene diazonium fluoroborate etc. Diazonium salts are one of the most versatile combinations of organic and inorganic components.

Generally, diazonium salts have \(Cl^−\), \(Br^−\), \(BF_4^−\) as \(X\). The name of these salts is based on the presence of the \(N_2^+\) group or the diazonium group.

The naming of these salts is done by adding the suffix diazonium to the parent hydrocarbon from which they are derived and then it is followed by the anion X such as bromide. The important properties of Diazonium Salts are:

1. They are ionic.
2. They are water-soluble.
3. Aryl diazonium salts are colourless crystalline solids.
4. Benzenediazonium chloride is soluble in water but reacts with it only when warmed.
5. Benzenediazonium fluoroborate is not soluble in water. It is pretty stable at room temperature.

From the above properties, we can conclude that the correct answer to this question is option 2.