question_answer

The radical can be identified by borax bead test is

A)  \[M{{g}^{2+}}\]                              

B)  \[C{{a}^{2+}}\]

C)  \[C{{u}^{+}}\]                                  

D)  \[C{{u}^{2+}}\]

Correct Answer: D

Solution :

                Borax bead test is given by only those transition metal ions or salts which contain unpaired electrons. Among the given ions, only \[C{{u}^{+}}\] and \[C{{u}^{2+}}\] are transition metal ions. Out of these only \[C{{u}^{2+}}\] contains unpaired electron, hence it gives borax bead test.