# NEET Chemistry Coordination Compounds Questions Solved

The 'brown ring' formed at the junction of two layers in the test of nitrate is due to the formation of a complex ion, ${\left[\mathrm{Fe}{\left({\mathrm{H}}_{2}\mathrm{O}\right)}_{5}\mathrm{NO}\right]}^{2+}.$ Which of the following statemens are correct for this complex [u=3.87 B.M.)

(i) Oxidation state of Fe is +1 and NO exists as ${\mathrm{NO}}^{+}.$

(ii) The complex ion is in octahedral geometry as attained by ${\mathrm{sp}}^{3}{\mathrm{d}}^{2}$ hybridisation.

(iii) The complex is paramagnetic and has three unpaired electrons due to transfer of electron from NO to ${\mathrm{Fe}}^{2+}.$

(iv) The complex is in octahedral geometry as attained by ${\mathrm{d}}^{2}{\mathrm{sp}}^{3}$ hybridisation.

(v) The brown colour of the complex is attributed to d-d transition of electron.

(A) (i), (ii) and (v)

(B) (iii), (iv) and (v)

(C) (i), (ii) and (iii)

(D) (ii), (iii) and (v)

Concept Videos :-

#1 | Definition of Double Salts & Coordination Compounds
#2 | Some Basic Concepts of Coordination Compounds
#4 | Stable & Unstable Complex
#5 | Perfect & Imperfect Complex
#6 | Basic Terms of Coordination Compounds

Concept Questions :-

Coordination comp,Introduction and Classification / Nomenclature
Explanation is a part of a Paid Course. To view Explanation Please buy the course.

Difficulty Level: