JEE Advanced (Matrix Match): The d & f-Block Elements & Coordination Compounds | Chapter-wise Tests for JEE Main & Advanced PDF Download

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DIRECTIONS (Q. No. 1 and 2) : Each question contains statements given in two columns, which have to be matched. The statements in Column-I are labelled A, B, C and D, while the statements in Column-II are labelled p, q, r, s and t. Any given statement in Column-I can have correct matching with ONE OR MORE statement(s) in Column-II. The appropriate bubbles corresponding to the answers to these questions have to be darkened as illustrated in the following example :

If the correct matches are A-p, s and t; B-q and r; C-p and q; and D-s then the correct darkening of bubbles will look like the given.

Q.1. Match the complexes in Column I with their properties listed in Column II.

Column I                                           Column II

(A) [Co(NH₃)₄(H₂O)₂]Cl₂                (p) geometrical isomers

(B) [Pt(NH₃)₂Cl₂]                              (q) paramagnetic

(C) [Co(H₂O)₅Cl]Cl                           (r) diamagnetic

(D) [Ni(H₂O)₆]Cl₂                              (s) metal ion with +2 oxidation state

Ans. (A - p, q, s); (B - p, r, s); (C - q, s); (D - q, s)

Solution. In [Co(NH₃)₄(H₂O)₂]²⁺, Co is in + 2 state having 3d⁷ configuration, which makes it paramagentic due to odd electrons. Moreover, it is an octahedral complex showing cis-trans isomerism w.r.t., H₂O.

(B) : (p), (r) and (s) 

In [Pt (NH₃)Cl₂], Pt is in + 2 state with configuration 5d⁸.
Since NH₃ is a strong field ligand, it will pair all the electrons making the complex diamagnetic. Moreover, it is a square planar complex showing cis-trans isomerism.

(C) : (q) and (s) In [Co(H₂O)₅Cl]Cl, Co is in + 2 state with 3d⁷ configuration making it paramagnetic.

(D) : (q) and (s) In [Ni(H₂O)₆]Cl₂, Ni is in + 2 state with 3d⁸ configuration. It is attached with weak field ligands, therefore it is paramagnetic.

Q.2. Match each of the reactions given in Column I with the corresponding product(s) given in Column II.

ColumnI                                                         Column II

(A) Cu + dil HNO₃                                           (p) NO

(B) Cu + conc HNO₃                                        (q) NO₂

(C) Zn + dil HNO₃                                            (r) N₂O

(D) Zn + conc HNO₃                                         (s) Cu (NO₃)₂

                                                                          (t) Zn(NO₃)₂

Ans. (A - p, s); (B - q, s); (C - r, t); (D - q, t)

Solution. 

DIRECTIONS (Q. No. 3) : Following question has matching lists. The codes for the list have choices (a), (b), (c) and (d) out of which ONLY ONE is correct.

Q.3. Match each coordination compound in List-I with an appropriate pair of characteristics from List- II and select the correct answer using the code given below the lists.

{en = H₂NCH₂CH₂NH₂; atomic numbers : Ti = 22; Cr = 24; Co = 27; Pt = 78}

List-I                                                         List-II

P. [Cr(NH₃)₄Cl₂]Cl                                   1. Paramagnetic and exhibits ionisation isomerism

Q. [Ti(H₂O)₅Cl](NO₃)₂                             2. Diamagnetic and exhibits cis-trans isomerism

R. [Pt(en)(NH₃)Cl]NO₃                            3. Paramagnetic and exhibits cis-trans isomerism

S. [Co(NH₃)₄(NO₃)₂]NO₃                       4. Diamagnetic and exhibits ionisation isomerism

Ans. (b)

Solution.