Q.

Statament I : conc. HNO3 can be transported in ‘Al’ vessels.Statement II : ‘Al’ forms a protective layer of oxide on it’s surface with conc.HNO3.

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a

Both Statements are true

b

Statement I is true Statement II is false

c

Statement I is false and Statement II is true

d

Both Statements are false

answer is A.

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Detailed Solution

Nitric acid  can be safely transported in Aluminium containers. The reason is that 'Al" is resistant or passive to the concentrated nitric acid due to the formation of protective oxide layer on its surface with concentrated nitric acid. This oxide layer cannot allow the acid to come in contact with the inside metal (Al).As a result further reaction stops.
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