Which of the following can be made passive?

i) Fe ii) Co iii) Ni iv) Cr

i, ii, iii and iv

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

Only i and ii

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

only iii and iv

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

only i, ii and iii

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

Open in App

Solution

The correct option is A i, ii, iii and iv
During passivization, the metal surface is made inactive by the formation of the oxide layer on the surface. This is done by the oxidation of the metal to a metal surface. All four metals (Fe, Co, Ni, and Cr) can be made passive by this method.

Hence, the correct option is $A$

Suggest Corrections

Similar questions

Which of the following are compounds ?

(i) CO (ii) No (iii) NO (iv) Co

(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)

In which of the following molecules carbon atom marked with asterisk (*) is asymmetric?

(a) (i), (ii), (iii) and (iv) (b) (i) ,(ii) and (iii)

Which of the following are isobars?

$_{18}^{40} A r$ $_{6}^{14} C$ $_{20}^{40} C a$ $_{7}^{14} N$

Join BYJU'S Learning Program