In the reactivity series of metals calcium lies above sodium or sodium above calcium ?
A metal X can replace another metal Y from its metal salts. Is X above or below Y in the reactivity series?
The figure represents the reactivity of metals then which of the following are correct?
(i) Sodium is more reactive than magnesium.
(ii) Magnesium ad aluminium metals displace lead.
(iii) Magnesium and aluminium metals displace calcium.
(iv) Iron and tin metals can displace magnesium.
(v) Most reactive metal is sodium.
(vi) Gold is least reactive.
(vii) Calcium and zinc metals displace iron.