Question

With the help of following reactions, arrange metals A, B, D and E in decreasing order of their reactivity ?
(a)`B+ANO_3 to BNO_3 +A`
(b)`A + HCl to AC l + 1/2H_2`
(c )`D+EC l to DCl +E`
(d)`D+HNO_3 to `No reaction
A. B gt D gt E gt A
B. B gt A gt D gt E
C. E gt D gt B gt A
D. None of these

Answer 1

Correct Answer - B
From given reactions, reactivity order
B gt A
`A gt H_2 `
D gt E
`H_2 gt D`
`rArr` B gt A gt D gt E