Iron is rendered passive by treatment with concentrated

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Iron is rendered passive by treatment with concentrated

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

Options:

A $H_{2} S O_{4}$
B $H_{3} P O_{4}$
C $H C l$
D $H N O_{3}$

Solution:

2254 Upvotes Verified Answer

The correct answer is:

H N O_{3}

Iron is rendered passive by treatment with concentrated

H N O_{3}

as an oxide layer is formed on the surface of iron making it passive.

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