Both Be and Al become passive on reaction with concentrated nitric acid due to
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a
The non-reactive nature of the metal
b
The non-reactive nature of the acid
c
The formation of an inert layer of oxide on the surface of the metals
d
Formation of active layer of oxide on the surface of metals
answer is C.
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Detailed Solution
Be and Al become passive (resistant) towards the reaction with concentrated nitric acid due to formation of protective oxide layer on the surface of the Be and Al metals. The layer which is formed is inert.