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Lead poisoning in the body can be removed by:
1. EDTA in the form of calcium dihydrogen salt
2. cis-platin
3. Zeisse’s salt
4. DMG

Total geometrical isomers possible for [Pd²⁺(NH₂-CH(CH₃)-CO₂^-)₂]⁰ are -
1. 2
2. 3
3. 4
4. 6

Isomerisms exhibited by ${\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_2{\left({\mathrm{H}}_2\mathrm{O}\right)}_2{\mathrm{Cl}}_2\right]}^{+}$ are
(1) ionisation, optical
(2) hydrate, optical
(3) geometrical, optical
(4) coordinate, geometrical

Of the following complex ions, one exhibits structure isomerism. That is:
1. ${\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}$
2. ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{NO}}_2\right]}^{2+}$
3. $\left[\mathrm{Pt}\left(\mathrm{en}\right){\mathrm{Cl}}_2\right]$
4. ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Cl}\right]}^{2+}$

$\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Br}\right]Cl$ and $\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Cl}\right]Br$  can be distinguished by and isomerism shown is:
1. ${\mathrm{BaCl}}_2$, ionisation
2. ${\mathrm{AgNO}}_3$, ionisation
3. ${\mathrm{AgNO}}_3$, coordinate
4. ${\mathrm{BaCl}}_2$, linkage

If excess of AgNO3 solution is added to 100 mL of a 0.024 M solution of dichlorobis (ethylene diamine) cobalt (III) chloride, how many mol of AgCl be precipitated:
(1) 0.0012
(2) 0.0016
(3) 0.0024
(4) 0.0048

Isomerism exhibited by [Co(EDTA)]^- is/are:
 
1. Optical & geometrical isomerism.
2. Geometrical isomerism.
3. Optical isomerism.
4. No isomerism is exhibited by [Co(EDTA)]^-

Which of the following is correct IUPAC name of any complex compound.
(A) Tris (acetyl acetonato) iron (III) chloride
(B) Hexachloroplatinum (IV) tetraammine dicyano platinate (IV)
(C) Ammine bromochloro methylamine platinum (II)
(D) Cis dichloro (ethylenediamine) platinum (II)

${\left[{\mathrm{Fe}}^{\mathrm{II}}\mathrm{Cl}{\left(\mathrm{CN}\right)}_4\left({\mathrm{O}}_2\right)\right]}^{4-}$ is named as:
1. chlorotetracyanodioxoferrate (II) ion
2. chlorotetracyanoperoxoferrate (II) ion
3. chlorotetracyanosuperoxoferrate (II) ion
4. none is correct

The total number of possible co-ordination isomers for the following compounds are:
$\left[\mathrm{Co}{\left(\mathrm{en}\right)}_3\right]\left[Cr{\left(C_2{O}_4\right)}_3\right]$
$\left[Cu{\left(N{H}_3\right)}_4\right]\left[CuC{l}_4\right]$
$\left[Ni{\left(en\right)}_3\right]\left[Co{\left(N{O}_2\right)}_6\right]$
1. 4, 4, 4
2. 2, 2, 2
3. 2, 2, 4
4. 4, 2, 4

${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$have similarity but not in
(A) magnetic moment
(B) C.N. and O.N.
(C) structure
(D) both (A) and (C)

Which is true for [Ni(en)₂]²⁺, Z(Ni) = 28?
(1) paramagnetism, dsp² , square planar, C.N. of Ni = 2
(2) diamagnetism, dsp², square planar, C.N. of Ni = 4
(3) diamagnetism, sp³, tetrahedral, C.N. of Ni = 4
(4) paramagnetism, sp³, square planar, C.N. of Ni = 4

Among $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4, {\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-} \mathrm{and} {\mathrm{NiCl}}_4^{2-}$,
(A) $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4 \mathrm{and} {\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are diamagnetic and ${\mathrm{NiCl}}_4^{2-}$ is paramagnetic
(B) $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4,\mathrm{and} {\mathrm{NiCl}}_4^{2-}$are diamagnetic and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ is paramagnetic
(C) $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ is diamagnetic and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-} \mathrm{and} {\mathrm{NiCl}}_4^{2-}$ are paramagnetic
(D) ${\mathrm{NiCl}}_4^{2-}\mathrm{and} {\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are diamagnetic and $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ is paramagnetic

Geometrical isomerism in coordination compunds is exhibited by
1. Square planar and tetrahedral complexes
2. Square planar and octahedral complexes
3. Tetrahedral and octahedral complexes
4. Squre planar, tetrahedral and octahedral complexes

Which of the following is not optically active?
1. ${\left[\mathrm{Co}{\left(\mathrm{en}\right)}_3\right]}^{3+}$
2. ${\left[\mathrm{Cr}{\left(\mathrm{ox}\right)}_3\right]}^{3-}$
3. $\mathrm{cis}-{\left[{\mathrm{CoCl}}_2{\left(\mathrm{en}\right)}_2\right]}^{+}$
4. $\mathrm{trans}-{\left[{\mathrm{CoCl}}_2{\left(\mathrm{en}\right)}_2\right]}^{+}$

Arrange the following in order of decreasing number of unpaired electrons:
(I) ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$  (II) ${\left[\mathrm{Fe}{\left(CN\right)}_6\right]}^{3-}$
(III) ${\left[\mathrm{Fe}{\left(CN\right)}_6\right]}^{4-}$  (IV) ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$
1. IV, I, II, III
2. I, II, III, IV
3. III, II, I, IV
4. II, III, I, IV

For which of the following dn
configuration of octahedral complex (es), can not exist in both high
spin and low spin forms.
(I) d³
(II) d⁵
(III) d⁶
(IV) d⁸
(1) II & III
(2) I & III
(3) I & IV
(4) III & IV

Which of the following complexes is diamagnetic?
(1) ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{4-}$
(2) ${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$
(3) ${\left[\mathrm{Ti}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$
(4) ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{\left(-\right)}$

In nitroprusside ion the iron and NO exist as Fe^II and NO⁺
rather than Fe^III and NO. These forms
can be differentiated by
1. estimating the concentration of iron
2. measuring the concentration of CN^–
3. measuring the solid state magnetic moment
4. thermally decomposing the compound

The complex ions ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{3-} and {\left[Fe{\left(CN\right)}_6\right]}^{4-}$
(1) Are both octahedral and paramagnetic
(2) Are both octahedral and diamagnetic
(3) Have same structure but opposite magnetic character
(4) Have different structure but opposite magnetic character

Of the following complex ions, the one that probably has the largest overall formation constant,
K_f , is
1. ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$
2. ${\left[\mathrm{Co}{\left(H_{2}O\right)}_6\right]}^{3+}$
3. ${\left[\mathrm{Co}{\left(H_{2}O\right)}_4{\left({\mathrm{NH}}_3\right)}_2\right]}^{3+}$
4. ${\left[\mathrm{Co}{\left(\mathrm{en}\right)}_3\right]}^{3+}$

Which of the following complex ions is Bronsted-Lowry acid?
1. [Cu(NH₃)₄]²⁺
2. [FeCl₄]^-
3. [Fe(H₂O)₆]³⁺
4. [Zn(OH)₄]^2-

The expected number of unpaired electrons for the complex ion [Cr(NH₃)₆]³⁺ are: 
1. 2
2. 3
3. 4
4. 5

The CFSE for ${\left[{\mathrm{CoCl}}_6\right]}^{4-}$ is 18000 ${\mathrm{cm}}^{-1}$. The $∆$ for ${\left[{\mathrm{CoCl}}_4\right]}^{2-}$ wil be :
1. 18000 ${\mathrm{cm}}^{-1}$
2. 16000 ${\mathrm{cm}}^{-1}$
3. 8000 ${\mathrm{cm}}^{-1}$
4. 2000 ${\mathrm{cm}}^{-1}$

Complex compound $\left[\mathrm{Cr}\left(\mathrm{NCS}\right){\left({\mathrm{NH}}_3\right)}_5\right]\left[ZnC{l}_4\right]$ will be
(1) Colourless & diamagnetic
(2) Green coloured & diamagnetic
(3) Green coloured & shows coordination isomerism
(4) Diamagnetic & shows linkage isomerism

The correct order of energies of d-orbitals of metal ions in a square planar complex is:
1. ${\mathrm{d}}_{\mathrm{xy}}={\mathrm{d}}_{\mathrm{yz}}={\mathrm{d}}_{\mathrm{zx}}>{\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}={\mathrm{d}}_{{\mathrm{z}}^2}$
2. ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}={\mathrm{d}}_{{\mathrm{z}}^2}>{\mathrm{d}}_{\mathrm{xy}}={\mathrm{d}}_{\mathrm{yz}}={\mathrm{d}}_{\mathrm{zx}}$
3. ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}>{\mathrm{d}}_{{\mathrm{z}}^2}>{\mathrm{d}}_{\mathrm{xy}}>{\mathrm{d}}_{\mathrm{yz}}={\mathrm{d}}_{\mathrm{zx}}$
4. ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}>{\mathrm{d}}_{\mathrm{xy}}>{\mathrm{d}}_{{\mathrm{z}}^2}>{\mathrm{d}}_{\mathrm{zx}}={\mathrm{d}}_{\mathrm{yz}}$

${\mathrm{MnO}}_4^{-}$ is of intense pink colour, though Mn is in (7+) oxidation state, it is due to
(1) Oxygen gives colour to it
(2) Charge transfer when Mn (7+) gives its electron to oxygen & oxidise to Mn (8+) temporaily
(3) Charge transfer when oxygen gives its electron to Mn (7+) changing in Mn (6+) temporaily
(4) none is correct explanation

[CoCl₂(NH₃)₄]⁺ + Cl^- → [CoCl₃(NH₃)₃] + NH₃
If in the above reaction, only one isomer of the product is obtained, then which of the following statement is true for the initial (reactant) complex?
1. Compound is in cis form.
2. Compound is in trans form.
3. compound is in both (cis and trans) forms.
4. Can't be predicted.

Aqueous solution of Ni²⁺ contains ${\left[\mathrm{Ni}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ and its magnetic moment is 2.83 B.M.When ammonia is added in it, comment on the magnetic moment of solution
1. It will remain same
2. It increases from 2.83 B.M.
3. It decreases from 2.83 B.M.
4. It can not be predicted theoretically

The complex [Fe(H₂O)5NO]²⁺ is formed in the brown ring test for nitrates when freshly prepared FeSO₄ solution is added to aq solution of ${\mathrm{NO}}_3^{-}$
followed by addition of conc.H₂SO₄ . Select correct statement about this complex:
(1) colour change is due to charge transfer
(2) it has iron in +1 oxidate state and nitrosyl as NO⁺
(3) it has magnetic moment of 3.87 B.M. confirming three unpaired electrons in Fe
(4) all are correct statements