Coordination Compounds PYQs Set 5 (PDF)

Set 5 of 20 · Questions 121-150 of 596

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Mere Teacher · Previous Year Questions

JEE Main Chemistry · Coordination Compounds · Set 5 (Q121-150)

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121.
The coordination environment of $Ca^{2 +}$ ion in its complex with $EDTA^{4 -}$ is :
1. (1) $tetrahedral$
2. (2) $trigonal prismatic$
3. (3) $octahedral$
4. (4) $square planar$
122.
The configurations of the complexes of manganese $A, B$ respectively are $t_{2 g}^{3} e_{g}^{1}, t_{2 g}^{4} e_{g}^{0}$ . Then $A, B$ are
1. (1) $(Mn (H_{2} O)_{6})^{2 +}, (Mn (CN)_{6})^{3 -}$
2. (2) $(Mn (H_{2} O)_{6})^{2 +}, (Mn (CN)_{6})^{4 -}$
3. (3) $(Mn (H_{2} O)_{6})^{3 +}, (Mn (CN)_{6})^{4 -}$
4. (4) $(Mn (H_{2} O)_{6})^{3 +}, (Mn (CN)_{6})^{3 -}$
123.
The molecule in which hybrid MOs involve only one $d -$ orbital of the central atom is
1. (1) $XeF_{4}$
2. (2) $[Ni (CN)_{4}]^{2 -}$
3. (3) $[CrF_{6}]^{3 -}$
4. (4) $BrF_{5}$
124.
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $C o^{3 +}$ is
1. (1) $[C o (H_{2} O)_{6}]^{3 +}, [C o (e n)_{3}]^{3 +}, [C o (N H_{3})_{6}]^{3 +}$
2. (2) $[C o (H_{2} O)_{6}]^{3 +}, [C o (N H_{3})_{6}]^{3 +}, [C o (e n)_{3}]^{3 +}$
3. (3) $[C o (N H_{3})_{6}]^{3 +}, [C o (e n)_{3}]^{3 +}, [C o (H_{2} O)_{6}]^{3 +}$
4. (4) $[C o (e n)_{3}]^{3 +}, [C o (N H_{3})_{6}]^{3 +}, [C o (H_{2} O)_{6}]^{3 +}$
125.
The molecular formula of Wilkinson catalyst, used in hydrogenation of alkenes is
1. (1) $Co (CO)_{8}$
2. (2) $((Ph_{3} P)_{3} RhCl)$
3. (3) $(Pt (NH_{3})_{2} Cl_{2})$
4. (4) $K (Ag (CN)_{2})$
126.
Given below are two statements, one is labelled as assertion A and the other is labelled as Reason R.
Assertion A: [CoCl( $N H_{3}$ ) $_{5}$ ] $^{2 +}$ absorbs at lower wavelength of light with respect to [Co( $N H_{3}$ ) $_{5}$ ( $H_{2}$ O)] $^{3 +}$
Reason R: It is because the wavelength of light absorbed depends on the oxidation state of the metal ion.
In the light of the above statements, choose the correct answer from the options given below:
1. (1) $A is false but R is true$
2. (2) $A is true but R is false$
3. (3) $Both A and R are true and R is the correct explaination of A$
4. (4) $Both A and R are true and R is NOT the correct explaination of A$
127.
The correct IUPAC name of $K_{2} MnO_{4}$ is
1. (1) $Potassium tetraoxopermanganate (VI)$
2. (2) $Potassium tetraoxidomanganate (VI)$
3. (3) $Dipotassium tetraoxidomanganate (VII)$
4. (4) $Potassium tetraoxidomanganese (VI)$
128.
The coordination number of Th in $K_{4}$ [Th $(C_{2} O_{4})_{4} (O H_{2})_{2}$ ] is $(C_{2} O_{4}^{2}^{-} = O x a l a t o)$
1. (1) $14$
2. (2) $10$
3. (3) $6$
4. (4) $8$
129.
Calculated magnetic moment value for $Fe^{2 +}$ ion in $BM$ is
1. (1) $3.87$
2. (2) $4.90$
3. (3) $2.84$
4. (4) $1.73$
130.
The correct statement among the following is:
1. (1) $Ni (CO)_{4} and (Ni (CN)_{4})^{2 -} are diamagnetic and (NiCl_{4})^{2 -} is paramagnetic.$
2. (2) $Ni (CO)_{4} and (NiCl_{4})^{2 -} are diamagnetic and (Ni (CN)_{4})^{2 -} is paramagnetic.$
3. (3) $(Ni (CN)_{4})^{2 -} and (NiCl_{4})^{2 -} are diamagnetic and Ni (CO)_{4} is paramagnetic.$
4. (4) $Ni (CO)_{4} is diamagnetic and (NiCl_{4})^{2 -} and (Ni (CN)_{4})^{2 -} are paramagnetic.$
131.
According to Werner's theory, the geometry of the complex is determined by
1. (1) $only from the primary valence in space$
2. (2) $number and position of the primary valencies in space$
3. (3) $number and position of the secondary valencies in space$
4. (4) $only from the position of secondary valence in space.$
132.
What is coordination number of the metal in $(Co (en)_{2} Cl_{2})^{2 +}$ ?
1. (1) $3$
2. (2) $4$
3. (3) $5$
4. (4) $6$
133.
$Match each set of hybrid orbitals from LIST-I with complex(es) given in LIST-II.$
$LIST-I$ $LIST-II$
$(P) d s p^{2}$ $(1) [F e F_{6}]^{4-}$
$(Q) s p^{3}$ $(2) [Ti(H_{2} O)_{3} C l_{3}]$
$(R) s p^{3} d^{2}$ $(3) [Cr(N H_{3})_{6}]^{3 +}$
$(S) d^{2} s p^{3}$ $(4) [F e C l_{4}]^{2-}$
$(5) Ni(CO)_{4}$
$(6) [Ni(CN)_{4}]^{2-}$
$The correct option is$
1. (1) $P \to 5 ; Q \to 4, 6 ; R \to 2, 3 ; S \to 1$
2. (2) $P \to 5, 6 ; Q \to 4 ; R \to 3 ; S \to 1, 2$
3. (3) $P \to 6 ; Q \to 4, 5 ; R \to 1 ; S \to 2, 3$
4. (4) $P \to 4, 6 ; Q \to 5, 6 ; R \to 1, 2 ; S \to 3$
134.
The correct order for wavelengths of absorption in the visible region for the following complexes will be
1. (1) $(Ni (NH_{3})_{6})^{2 +} < (Ni (H_{2} O)_{6})^{2 +} < (Ni (NO_{2})_{6})^{4 -}$
2. (2) $(Ni (NO_{2})_{6})^{4 -} < (Ni (NH_{3})_{6})^{2 +} < (Ni (H_{2} O)_{6})^{2 +}$
3. (3) $(Ni (NH_{3})_{6})^{2 +} < (Ni (NO_{2})_{6})^{4 -} < (Ni (H_{2} O)_{6})^{2 +}$
4. (4) $(Ni (NO_{2})_{6})^{4 -} < (Ni (H_{2} O)_{6})^{2 +} < (Ni (NH_{3})_{6})^{2 +}$
135.
Which of the following will have maximum stabilization due to crystal fild?
1. (1) $[Ti(H_{2} O)_{6}]^{3 +}$
2. (2) $[Co(H_{2} O)_{6}]^{2 +}$
3. (3) $[Co(CN)_{6}]^{3 -}$
4. (4) $[Cu(N H_{3})_{4}]^{2 +}$
136.
As per IUPAC nomenclature, the name of the complex [Co $(H_{2} O)_{4} (N H_{3})_{2}$ ] $C l_{3}$ is :
1. (1) $Tetraaquadiaminecobalt (III) chloride$
2. (2) $Tetraaquadiamminecobalt (III) chloride$
3. (3) $Diaminetetraaquacobalt (III) chloride$
4. (4) $Diamminetetraaquacobalt (III) chloride$
137.
Pick out the correct statement with respect to [Mn(CN) $_{6}$ ] $^{3-}$ :
1. (1) $It is s p^{3} d^{2} hybridised and octahedral$
2. (2) $It is s p^{3} d^{2} hybridised an tetrahedral$
3. (3) $It is d^{2} s p^{3} hybridised and octahedral$
4. (4) $It is d s p^{2} hybridised and square planar.$
138.
The d-orbital electronic configuration of the complex among $(Co (en)_{3})^{3 +}, (CoF_{6})^{3 -}$ , $(Mn (H_{2} O)_{6})^{2 +}$ and $(Zn (H_{2} O)_{6})^{2 +}$ that has the highest CFSE is :
1. (1) $t_{2 g}^{6} e_{g}^{0}$
2. (2) $t_{2 g}^{3} e_{g}^{2}$
3. (3) $t_{2 g}^{4} e_{g}^{2}$
4. (4) $t_{2 g}^{6} e_{g}^{4}$
139.
Homoleptic complexes among the following are
I. $K_{3} (Al (C_{2} O_{4})_{3})$
II. $(CoCl_{2} (en)_{2})^{+}$
III. $K_{2} (Zn (OH)_{4})$
1. (1) $I only$
2. (2) $I and II only$
3. (3) $I and III only$
4. (4) $Ill only:$
140.
When $AgNO_{3}$ solution is added in excess to $1 M$ solution of $CoCl_{3} \cdot X NH_{3}$ , one mole of $AgCl$ is formed. What is the value of ' $X$ '?
1. (1) $1$
2. (2) $4$
3. (3) $3$
4. (4) $2$
141.
Crystal field splitting energies for octahedral $(Δ_{0})$ and tetrahedral $(Δ_{t})$ geometries caused by the same ligands are related through the expression
1. (1) $Δ_{0} = Δ_{t}$
2. (2) $4 Δ_{0} = 9 Δ_{t}$
3. (3) $9 Δ_{0} = Δ_{t}$
4. (4) $Δ_{0} = 2 Δ_{t}$
142.
Which of the following can be reduce easily
1. (1) $V (C O)_{6}$
2. (2) $Mo (C O)_{6}$
3. (3) $[C o (C O)_{4}]^{-}$
4. (4) $Fe (C O)_{5}$
143.
Crystal filed stabilization energy for high spin d4 octahedral complex is
1. (1) $-1.8 Δ0$
2. (2) $-1.6 Δ0 + P$
3. (3) $-1.2 Δ0$
4. (4) $-0.6 Δ0$
144.
The correct statement about of the magnetic prperties of [Fe(CN) $_{6}$ ] $^{3-}$ and [ $F e F_{6}$ ] $^{3-}$ is : (Z = 26)
1. (1) $both are paramagnetic$
2. (2) $both are diamagnetic$
3. (3) $[Fe(CN)_{6}]^{3-} is diamagnetic, [F e F_{6}]^{3-} is paramagnetic.$
4. (4) $[Fe(CN)_{6}]^{3-} is paramagnetic, [F e F_{6}]^{3-} is diamagnetic.$
145.
The Crystal Field Stabilization Energy $(CFSE)$ of $[CoF_{3} (H_{2} O)_{3}] (Δ_{0} < P)$ is
1. (1) $- 0.8 Δ_{0}$
2. (2) $- 0.8 Δ_{0} + 2 P$
3. (3) $- 0.4 Δ_{0}$
4. (4) $- 0.4 Δ_{0} + P$
146.
Which of the following will give maximum number of isomers?
1. (1) $[C o (N H_{3})_{4} C l_{2}]$
2. (2) $[N i (e n) (N H_{3})_{4}]^{2 +}$
3. (3) $[N i (C_{2} O_{4}) (e n)_{2}]^{2 -}$
4. (4) $[C r (S C N)_{2} (N H_{3})_{4}]^{+}$
147.
$The number of paramagnetic complexes among (FeF_{6})^{3 -}, (Fe (CN)_{6})^{3 -}, (Mn (CN)_{6})^{3 -}, (Co (C_{2} O_{4})_{3})^{3 -}, (MnCl_{6})^{3 -}, and (CoF_{6})^{3 -}, which involved d^{2} sp^{3} hybridization is .$
148.
$The overall stability constant of the complex ion[Cu(N H_{3})_{4}]^{2 +} is 2.1 \times 1 0^{13} . The overall dissociations constant is y \times 1 0^{- 14} . Then is ____ .(Nearest integer)$
149.
$Among the species given below, the total number of diamagnetic species is ___. H atom, N O_{2} monomer, O_{2}^{-} (superoxide), dimeric sulphur in vapour phase, M n_{3} O_{4}, (N H_{4})_{2} [F e C l_{4}], (N H_{4})_{2} [N i C l_{4}], K_{2} M n O_{4}, K_{2} C r O_{4}$
150.
$Total number of unpaired electrons in the complex ions (Co (NH_{3})_{6})^{3 +} and (NiCl_{4})^{2 -} is$