Based on the following information arrange four metals `A,B,C` and `D` in order of decreasing ability to act as reducing agents `:`
`(I)` Only A,B, and C react with `1M HCl` to give `H_(2)(g)`
`(II)` When C is added to solutions of the other metal ions, metallic B and D are formed
`(III)` Metal C dows not reduced `A^(n+)`

Based on the following information, arrange four metals A, B, C and D in the order of decreasing ability to act as reducing agents: (I) only A,B and C react with 1 M HCI to give H_(2) (g) (II) When C is addd to solution of the other metal ions, metallic B and D are formed (III) Metal C does not reduce A^(n+) CgtAgtBgtD , CgtAgtDgtB , AgtCgtDgtB , AgtCgtBgtD

Based on the following informations arrange four metals, A,B,C and D in order of increasing ability to act as reducing agents : (I) Only C react with 1 M HCl to give H_(2) (g) (II) When A is added to solution of the other metal ions, metallic D is formed but not B or C

Based on the following informations arrange four metals, A,B,C and D in order of increasing ability to act as reducing agents : (I) Only C react with 1 M HCl to give H_(2) (g) (II) When A is added to solution of the other metal ions, mettalic D is formed but not B or C

A hydride of 2^(nd) period alkali metal (A ) on reaction with compound of Boron (B ) to give a reducing agent (c ) I dentify A, B and C.