Which reagent can be used to identify `Ni^(2+)` ion ?

reagent which can be used is :

Which of the following reagents can used to identify bromide and iodide ions in the presence of organic layer?

Which of the following reagents can used to identify bromide and iodide ions in the presence of organic layer?

Which of the following reagents can be used for identification of phenol?

Which reagents can be used to distinguish glucose and fructose ? (I) Bromine water , (II) Tollen's reagent , (III) Schiff's reagent