A red precipitate is obtained when an ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II).
Which of the following statements is not true?

1.  Complex has symmetrical H-bonding.
2.  Red complex has a tetrahedral geometry.
3.  Dimethylglyoxime functions as a bidentate ligand.
4.  Red complex has a square planar geometry.

Subtopic:  Ligands |
 57%
AIPMT - 2012
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A low spin complex of d6-cation in an octahedral field will have the following energy:

1.   -1250+3P

2.  -250+2P

3.  -250+P

4.  -1250+P

(0 = Crystal field splitting energy in an octahedral field, P = Electron pairing energy)

Subtopic:  VBT, CFT & their Limitations |
 60%
AIPMT - 2012
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Identify the complex among the following that is not expected to exhibit isomerism:
 

1. [Pt(NH3)2Cl2]

2. [Ni(NH3)2Cl2]

3. [Ni(en)3]2+

4. [Ni(NH3)4(H2O)2]2+

Subtopic:  Isomerism in Coordination Compounds |
From NCERT
AIPMT - 2010
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The carbonyl compound with the strongest C-O bond is:

1. Fe(CO)5

2. [Mn(CO)6]+

3. Cr(CO)6

4. [V(CO)6]-

Subtopic:  VBT, CFT & their Limitations |
 59%
From NCERT
AIPMT - 2011
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Among the given complex, the complex having the highest paramagnetic behaviour is:
(At. No. Ti = 22, Cr = 24, Co = 27, Zn = 30)

1. ZnNH362+

2. TiNH363+

3. CrNH363+

4. CoNH363+

Subtopic:  VBT, CFT & their Limitations |
 57%
From NCERT
AIPMT - 2011
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Crystal field splitting energy for high spin doctahedral complex is:
1. – 1.2 \(\Delta_{0}\)
2. – 0.6 \(\Delta_{0}\)
3. – 0.8 \(\Delta_{0}\)
4. –1.6 \(\Delta_{0}\)
Subtopic:  VBT, CFT & their Limitations |
 75%
NEET - 2013
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In a particular isomer of [Co(NH3)4Cl2]°, the Cl–Co–Cl angle is 90°, and the isomer is known as:
1. Optical isomer
2. Cis-isomer
3. Position isomer
4. Linkage isomer
Subtopic:  Isomerism in Coordination Compounds |
 77%
From NCERT
NEET - 2013
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The anion of acetylacetone (acac) forms Co(acac)chelate with Co3+. The rings of the chelate are:
1. Five membered
2. Four membered
3. Six membered
4. Three membered
Subtopic:  Ligands |
From NCERT
NEET - 2013
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The correct IUPAC name for [CrF2(en)2]Cl is:
 
1. Chlorodifluoridoethylenediaminechromium(III) chloride
2. Bis-(ethylene diamine)difluoridochromium(III) chloride
3. Difluorobis-(ethylene diamine)chromium(III) chloride
4. Chlorodifluoridobis(ethylenediamine)chromium (III)
Subtopic:  Introduction, Classification and Nomenclature |
 80%
From NCERT
NEET - 2013
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Which among the following is a paramagnetic complex?
1. [Co(NH3)6]3+
2. [Pt(en)Cl2]
3. [CoBr4]2–
4. Mo(CO)6
(At. No. Mo = 42, Pt = 78)
Subtopic:  VBT, CFT & their Limitations |
 72%
From NCERT
NEET - 2013
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