You visited us 1 times! Enjoying our articles? Unlock Full Access!

Introduction to d and f Block Elements

Iron becomes ...

Question

Iron becomes possive by ............. due to formation of ................. .

d i l . H C l, F e_{2} O_{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Aqua-regia,

F e_{3} O_{4}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

conc.

H_{2} S O_{4}, F e_{3} O_{4}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

conc.

H C l, F e_{3} O_{4}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Aqua-regia, $F e_{3} O_{4}$
Iron becomes passive by Aqua-regia due to formation of extremely thin (almost invisible) and impervious film of ferroso ferric oxide $F e_{3} O_{4}$ on the surface of iron.
Passivity of iron is the inertness exhibited by it under conditions in which chemical activity is to be expected.

Suggest Corrections

Similar questions

F e_{2} O_{3} ⟶ F e_{3} O_{4}

n

F e_{3} O_{4}

Δ G = - 177

2 F e (s) + \frac{3}{2} O_{2} (g) \to F e_{2} O_{3} (s)

Δ G = - 19 K c a l

4 F e_{2} O_{3} (s) + F e (s) \to 3 F e_{3} O_{4} (s)

F e_{3} O_{4} (s)

18 %

F e_{3} O_{4}

F e_{3} O_{4}

F e_{2} O_{3}

0.40

(F e_{3} O_{4})

F e_{3} O_{4} + 4 C O \to 3 F e + 4 C O_{2}

F e_{3} O_{4}

F e_{3} O_{4}

F e_{3} O_{4} + 4 C O \to 3 F e + 4 C O_{2}

F e_{3} O_{4}

F e_{3} O_{4}

m o l^{- 1}

Join BYJU'S Learning Program