The number of metals that show passivity with concentrate H N O 3 among Cr, Fe, Ni, Cu, Zn, Al, Ag, Sn

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The number of metals that show passivity with concentrate

H N O_{3}

among
Cr, Fe, Ni, Cu, Zn, Al, Ag, Sn

Chemistryp Block Elements (Group 15, 16, 17 & 18)JEE Main

Solution:

2239 Upvotes Verified Answer

The correct answer is: 4.00

C r, F e, N i

and

A l

react with conc.

{H N O}_{3}

to form a protective oxide layer which protest the metal surface from further reaction.

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