Structural of Ascorbic acid is represented as follows

How many of the following reagents can gives positive test with ascorbic acid.
`{:(Cu_(2)Cl_(2)+NH_(4)OH,"2,4"-DNP,"Na Metal",HCL+ZnCl_(2),FeCl_(3)),(" (I)"," (II)"," (III)"," (IV)","(V)"),("NAOH+Phenophthalein",dil. KMNO_(4),Br_(2)//H_(2)O,AgNO_(3)+NH_(4)OH,I_(2)+NaOH),(" (VI)"," (VII)"," (VIII)"," (IX)","(X)"):}`

Answer

6

Explanation

Na Metal `HCl+ZnCl_(2), FeCl_(3), NaOH` +Phenolpthalein, dill `KMnO_(4)`, `Br_(2)//H_(2)O` gives positive test with ascorbic acid.