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Question

Passivity is exhibited by: A)Be,B)Mg,C)Al,D)B
  1. A,B
  2. B,C
  3. A,C
  4. B,D

A
A,C
B
B,C
C
A,B
D
B,D
Solution
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Action of oxidizing agents such as conc. nitric acid forms a layer of an oxide on the surface of Be and Al. Hence these metals become passive and do not react.

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