Coordination Compounds PYQs Set 17 (PDF)

Set 17 of 20 · Questions 481-510 of 596

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Mere Teacher · Previous Year Questions

JEE Main Chemistry · Coordination Compounds · Set 17 (Q481-510)

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481.
Consider the following reaction and statements :
$[C o (N H_{3})_{4} B r_{2}]^{+}$ + $B r^{-}$ → [Co( $N H_{3}$ ) $_{3} B r_{3}$ ] + $N H_{3}$
(I) Two isomers are produced if the reactant complex ion is a cis-isomer.
(II) Two isomers are produced if the reactant complex ion is a tran-isomer.
(III) Only one isomer is produced if the reactant complex ion is a trans-isomer.
(IV) Only one isomer is produced if the reactant complex ion is a cis-isomer.
The correct statements are :
1. (1) $(III) and (IV)$
2. (2) $(II) and (IV)$
3. (3) $(I) and (II)$
4. (4) $(I) and (III)$
482.
A group of atoms can function as a ligand only when
1. (1) $it is a small molecule$
2. (2) $it has an unshared electron pair$
3. (3) $it is a negatively charged ion$
4. (4) $it is a positively charged ion.$
483.
The IUPAC name of $K_{3}$ Fe $(C N)_{6}$ is :
1. (1) $Potassium hexacyanoferrate(II)$
2. (2) $Potassium hexacyanoferrate(III)$
3. (3) $Potassium hexacyanoiron(II)$
4. (4) $Tripotassium hexacyanoiron(II)$
484.
Observe the following complexes
$(Mn (CN)_{6})^{3 -}, (Fe (CN)_{6})^{- 3}, (Co (C_{2} O_{4})_{3})^{3 -}, (MnCl_{6})^{3 -}, (Fe (CN)_{6})^{4 -}, (CoF_{6})^{3 -}$
From the above, the number of inner orbital complexes with paramagnetic nature is
1. (1) $2$
2. (2) $1$
3. (3) $3$
4. (4) $4$
485.
Which of the following will show optical isomerism ?
1. (1) $[Cu(N H_{3})_{4}]^{2 +}$
2. (2) $[Z n C l_{4}]^{2-}$
3. (3) $[Cr(C_{2} O_{4})_{3}]^{3-}$
4. (4) $[Co(CN)_{6}]^{3-}$
486.
The correct order of ligands arranged in increasing field strength.
1. (1) $F^{-} < Br^{-} < I^{-} < NH_{3}$
2. (2) $Br^{-} < F^{-} < H_{2} O < NH_{3}$
3. (3) $H_{2} O < - OH < CN^{-} < NH_{3}$
4. (4) $Cl^{-} < - OH < Br^{-} < CN^{-}$
487.
According to valence bond theory the metal atom or ion can make use of which of the following orbitals to yield hybrid orbitals, that can form bonds with ligands.
1. (1) $(n - 1) d, (n - 1) s, np$
2. (2) $(n - 1) d, ns, np$
3. (3) $(n - 1) d, ns, (n-1)p$
4. (4) $nd, (n-1)s, (n - 1) p$
488.
The correct combination is :
1. (1) $[N i C l_{4}]^{2-} - square-planar; [Ni(CN)_{4}]^{2-} - paramagnetic$
2. (2) $[Ni(CN)_{4}]^{2-} - tetrahedral; [Ni(CO)_{4}] - paramagnetic$
3. (3) $[N i C l_{4}]^{2-} - paramagnetic; [Ni (C O)_{4}] - tetrahedral$
4. (4) $[N i C l_{4}]^{2-} - diamagnetic; [Ni (C O)_{4}] - square-planar$
489.
$s p^{3} d^{2}$ hybridization is not displayed by :
1. (1) $P F_{5}$
2. (2) $S F_{6}$
3. (3) $[C r F_{6}]^{3-}$
4. (4) $B r F_{5}$
490.
Which of the following statements are incorrect?(A) Co+3 with strong field ligand forms high magnetic moment complex.(B) For Co+3 if pairing energy $(P) > Δ_{0}$ then the complex formed will have $t_{2 g}^{4}, e_{g}^{2}$ configuration(C) For $[Co (en)_{3}]^{3 +} λ_{absorbed}$ is less thenλabsorbed for $[CoF_{6}]^{3 -}$ (D) If $Δ_{0} = 18000 cm^{- 1}$ for Co+3 then with same ligands for it $Δ_{t} = 16000 cm^{- 1}$
1. (1) $A, D$
2. (2) $B, C$
3. (3) $A, B$
4. (4) $A$
491.
Number of complexes from the following with even number of unpaired " $d$ " electrons is
$(V (H_{2} O)_{6})^{3 +}, (Cr (H_{2} O)_{6})^{2 +}, (Fe (H_{2} O)_{6})^{3 +}, (Ni (H_{2} O)_{6})^{3 +}, (Cu (H_{2} O)_{6})^{2 +}$
[Given atomic numbers : $V = 23, Cr = 24, Fe = 26, Ni = 28 Cu = 29$ ]
1. (1) $2$
2. (2) $1$
3. (3) $4$
4. (4) $5$
492.
Addition of excess aqueous ammonia to a pink coloured aqueous solution of $M C l_{2}$ . $6 H_{2}$ O (X) and $N H_{4}$ Cl gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1 : 3 electrolyte. The reaction of X with excess HCl at room temperature results in the formation of a blue coloured complex Z. The calculated spin only magnetic moment of X and Z is 3.87 B.M., whereas it is zero for complex Y. Among the following options, which statement(s) is (are) correct?
1. (1) $The hybridization of the central metal ion in Y is d^{2} s p^{3}$
2. (2) $Addition of silver nitrate to Y gives only two equivalents of silver chloride$
3. (3) $When X and Z are in equilibrium at 0ºC, the colour of the solution is pink$
4. (4) $Z is a tetrahedral complex$
493.
Simplified absorption spectra of three complexes $((i)$ , $(ii)$ and $(iii))$ of $Mn^{n +}$ ion are provided below; their $λ_{max}$ values are marked as $A$ , $B$ and $C$ respectively. The correct match between the complexes and their $λ_{max}$ values is

(i) $[M (NCS)_{6}]^{(- 6 + n)}$ (ii) $[MF_{6}]^{(- 6 + n)}$
(iii) $[M (NH_{3})_{6}]^{n +}$
1. (1) $A - (i), B - (ii), C - (iii)$
2. (2) $A - (ii), B - (iii), C - (i)$
3. (3) $A - (ii), B - (i), C - (iii)$
4. (4) $A - (iii), B - (i), C - (ii)$
494.
For the square planar complex [M abcd] (where, M =central metal ; a, b, c and d are monodentate ligands) the number of possible geometrical isomers are
1. (1) $1$
2. (2) $2$
3. (3) $3$
4. (4) $4$
495.
Which statement is not true with respect to nitrate ion test ?
1. (1) $A dark brown ring is formed at the junction of two solutions.$
2. (2) $Ring is formed due to nitroferrous sulphate complex.$
3. (3) $The brown complex is [Fe (H_{2} O)_{5} (NO)] S O_{4} .$
4. (4) $Heating the nitrate salt with cone. H_{2} S 0_{4}, light brown fumes are evolved.$
496.
The order of energy absorbed which is responsible for the color of complexes
A. $(Ni (H_{2} O)_{2} (en)_{2})^{2 +}$
B. $(Ni (H_{2} O)_{4} (en))^{2 +}$ and
C. $(Ni (en)_{3})^{2 +}$ is
1. (1) $B > A > C$
2. (2) $A > B > C$
3. (3) $C > B > A$
4. (4) $C > A > B$
497.
The crystal field stabilisation energy $($ CFSE) for $[C o C l_{6}]^{4 -}$ is 18000 $c m^{- 1}$ The CFSE for $[C o C l_{4}]^{2 -}$ will be
1. (1) $6000 c m^{- 1}$
2. (2) $16000 c m^{- 1}$
3. (3) $18000 c m^{- 1}$
4. (4) $8000 c m^{- 1}$
498.
The hybridization and magnetic behaviour of cobalt ion in $(Co (NH_{3})_{6})^{3 +}$ complex, respectively is
1. (1) $s p^{3} d^{2} and diamagnetic$
2. (2) $d^{2} s p^{3} and paramagnetic$
3. (3) $d^{2} s p^{3} and diamagnetic$
4. (4) $s p^{3} d^{2} and paramagnetic$
499.
Match List I with List II
$List - I A. K_{2} (Ni (CN)_{4}) B. (Ni (CO)_{4}) C. (Co (NH_{3})_{6}) Cl_{3} D. Na_{3} (CoF_{6}) List - II I. sp^{3} II. sp^{3} d^{2} III. dsp^{2} IV. d^{2} sp^{3}$
Choose the correct answer from the options given below:
1. (1) $A-III, B-I, C-IV, D-II1$
2. (2) $A-III, B-I, C-II, D-IV$
3. (3) $A-I, B-III, C-II, D-IV$
4. (4) $A-III, B-II, C-IV, D-I$
500.
$Match the LIST-I with LIST-II (Complex/ Species) (Shape & magnetic moment)$
$LIST-I$ $LIST-II$
$A. (Ni (CO)_{4})$ $I. Tetrahedral, 2.8 BM$
$B. (Ni (CN)_{4})^{2 -}$ $II. Square planar, 0 BM$
$C. (NiCl_{4})^{2 -}$ $III. Tetrahedral, 0 BM$
$D. (MnBr_{4})^{2 -}$ $IV. Tetrahedral, 5.9 BM$
$Choose the correct answer from the options given below:$
1. (1) $A-I, B-II, C-III, D-IV$
2. (2) $A-IV, B-I, C-III, D-II$
3. (3) $A-III, B-II, C-I, D-IV$
4. (4) $A-III, B-IV, C-II, D-I$
501.
Which of the following complexes is used to be as an anticancer agent ?
1. (1) $mer-[Co(NH3)3Cl]$
2. (2) $Cis - [Pt Cl2(NH3)2]$
3. (3) $cis - K2[Pt Cl2Br2]$
4. (4) $Na2CoCl4$
502.
Match List – I with List - II
List – I List - II(Complex) (Hybridisation & Magnetic characters)
(A) $(MnBr_{4})^{2 -}$ (I) $d^{2} s^{3} &$ diamagnetic(B) $(FeF_{6})^{3 -}$ (II) $sp^{3} d^{2} &$ paramagnetic(C) $(Co (C_{2} O_{4})_{3})^{3 -}$ (III) sp3& diamagnetic(D) $(Ni (CO)_{4})$ (IV) sp3& paramagneticChoose the correct answer from the options given below :
1. (1) $(A) -(IV), (B) - (II), (C) - (I), (D) - (III)$
2. (2) $(A) - (III), (B) - (I), (C) - (II), (D) - (IV)$
3. (3) $(A) -(IV), (B) - (I), (C) - (II), (D) - (III)$
4. (4) $(A) - (III), (B) - (II), (C) - (I), (D) - (IV)$
503.
An example of a sigma bonded organometallic compound is
1. (1) $Ruthenocene$
2. (2) $Grignard's reagent$
3. (3) $Ferrocene$
4. (4) $Cobaltocene$
504.
Which is diamagnetic?
1. (1) $[C o (F)_{6}]^{3 -}$
2. (2) $[N i (C N)_{4}]^{2 -}$
3. (3) $[N i C 1_{4}]^{2 -}$
4. (4) $[F e (C N)_{6}]^{3 -}$
505.
The following ligand is:
1. (1) $hexadentate$
2. (2) $tetradentate$
3. (3) $bidentate$
4. (4) $tridentate$
506.
The number of possible optical isomers for the complexes $M A_{2} B_{2}$ with $s p^{3}$ and $d s p^{2}$ hybridized metal atom, respectively, is :
1. (1) $0 and 0$
2. (2) $2 and 2$
3. (3) $0 and 2$
4. (4) $0 and 1$
507.
Match List - I with List - II.
$List - I (Complex) (A) (CoF_{6})^{3 -} (B) (NiCl_{4})^{2 -} (C) (Co (NH_{3})_{6})^{3 +} (D) (Ni (CN)_{4})^{2 -} List - II (Hybridisation of central metal ion) (I) d^{2} sp^{3} (II) sp^{3} (III) sp^{3} d^{2} (IV) dsp^{2}$
Choose the correct answer from the options given below :
1. (1) $(A)-(I), (B)-(IV), (C)-(III), (D)-(II)$
2. (2) $(A)-(I), (B)-(II), (C)-(III), (D)-(IV)$
3. (3) $(A)-(III), (B)-(IV), (C)-(I), (D)-(II)$
4. (4) $(A)-(III), (B)-(II), (C)-(I), (D)-(IV)$
508.
The total number of possible isomers for square-planar $[P t (C l) (N O_{2}) (N O_{3}) (S C N)]^{2-}$ is :
1. (1) $8$
2. (2) $12$
3. (3) $16$
4. (4) $24$
509.
A reaction of cobalt(III) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A (violet coloured) and B(green coloured). A can show optical activity, but, B is optically inactive. What type of isomers does A and B represent?
1. (1) $Ionisation isomers$
2. (2) $Linkage isomer$
3. (3) $Coordination isomers$
4. (4) $Geometrical isomers$
510.
$Number of complexes which will exhibit synergic bonding amongst, [Cr (C O)_{6}], [Mn (C O)_{5}] and [M n_{2} (C O)_{10}] is________.$