This is the order of activity in decreasing way for the mentioned metals
Mn>Zn>Cr>Fe>Cd>Co>Ni>Pb
Fe is in between Cr and Cd, it is more active than Cd and less active than Cr, so it will displace Cd but not Cr.
Answer:Fe (it will displace Cd, but not Cr)
Oh yeah I know it’s hard to get it
Answer:
Explanation:
From the information given:
(a)
(b)
(c)
∴
(d)
∴
(e)
∴
∴
Answer:
Please find the complete solution in attached file.
Explanation: