Question

(E) The surfaces of which of the following metals are covered with a thin layer of oxide at ordinary temperature:

           (I) Magnesium                                                    (II) Aluminium

          (III) zinc                                                                (IV) Sodium

         (a) Both I and II                                                                          (b) Both II and III

         (c) I, II and III                                                                               (d) Only IV

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Answer 1

Answer:

option c is correct .

Magnesium,Aluminium and zinc

Answer 2

Answer:

(c) I , II AND III

IS CORRECT