Question

Read the following and answer any four questions from 20 (i) to 20 (v).
A student was given Mg, Zn, Fe and Cu metals. He puts each of them in dil. HCl
contained in different test tubes.
20. (i) Which is the correct order of reactivity?
(a) Mg < Zn < Fe < Cu
(c) Mg> Zn > Fe > Cu
(b) Mg < Fe < Zn < Cu
(d) Mg > Fe > Zn > Cu
20. (ii) Which will given H2 with its 5%?
(a) Mg
(c) Zn
(b) Cu
(d) Fe
20. (iii) Choose the correct statement.
(a) Cu metal will be displaced by all metals
(b) Cu metal will displace the all other metals
(c) Mg metal will be displaced by all other metals
(d) None of these correct
20. (iv) Which of these reaction(s) is/are correct?
(a) Cu+H,SO4 CuSO4+H2T
(6) Fe + HS04 FeSO4 + H2T
(c) Zn+HS04 ZnSO4 + H2T
(d) All of the above

Answer 1

Explanation:

(b) Mg < Fe < Zn < Cu(6) Fe + HS04 FeSO4 + H2T