On the basis of standard electrode potential values, suggest which of the following reactions would take place? (Consult the book for E V value). 

(i) Cu + Zn²⁺ → Cu²⁺ + Zn

(ii) Mg + Fe²⁺ → Mg²⁺ + Fe

(iii) Br2 + 2Cl^– → Cl₂ + 2Br^–

 (iv) Fe + Cd²⁺ → Cd + Fe²⁺

How many of these compounds will undergo disproportionation on hydrolysis? CO?, NO?, Cl?, F?, ClO?, Cl?O?, N?O?, SO?, P?O??

40. Best reducing agent is:
(a) He              (b) Be           (c) Li            (d) Al

37. Which element is considered to have oxidation number of +3 in all its compounds?

(a) Be              (b) Li             (c) Al         (d) Sc

36. Oxidation number ofS in S₂O₈^-2 is

(a) -2           (b) -6           (c) +2          (d) +6

32. Assertion: Na⁺ ion has an oxidation number of +1, Mg²⁺ ion, +2, Fe³⁺ ion, +3, Cl^– ion, –1, O^2– ion, –2; and so on.

Reason: For ions composed of only one atom, the oxidation number is equal to the charge on the ion.