Urea reacts with water to form A which will decompose to form B. B when passed through \(\left(Cu\right)^{2 +}\) (aq), deep blue color solution C is formed. What is the formula of C from the following?

1. \(\left[Cu \left(NH_{3}\right)_{4}\right]^{2 +}\) 2. \(Cu \left(\right. OH \left.\right)_{2}\)
3. \(CuCO_{3} . Cu (OH)_{2}\) 4. \(CuSO_{4}\)

Subtopic:  d-Block Elements- Properties & Uses |
 71%
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NEET - 2020
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A complex has a molecular formula MSO4Cl.6H2O. Its aqueous solution gives white precipitate with barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution.

If the secondary valence of the metal is six, the correct representation of the complex is:

1. [M(H2O)4Cl]SO4.2H2O
2. [M(H2O)6]SO4  
3. [M(H2O)5Cl]SO4.H2O
4. [M(H2O)3Cl]SO4.3H2O

Subtopic:  Werner’s Theory |
 72%
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The chemical formula for tris(ethane-1,2-diamine)iron(II) phosphate is: 
1. [Fe(CH3-CH(NH2)2)3](PO4)3  
2. [Fe(H2N-CH2-CH2-NH2)3](PO4
3. [Fe(H2N-CH2-CH2-NH2)3](PO4)2  
4. [Fe(H2N-CH2-CH2-NH2)3]3(PO4)2

Subtopic:  Introduction, Classification and Nomenclature |
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The correct order of increasing field strength of ligands is:

1. SCNFCNC2O42-

2. FSCNC2O42CN-

3. CNC2O42SCNF-

4. SCNFC2O42CN-

Subtopic:  Ligands |
 55%
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NEET - 2020
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The isomerism displayed by K3[Co(NO2)6] and K3[Co(ONO)6] is: 

1. Linkage 2. Co-ordination
3. Ionization 4. Geometrical
Subtopic:  Isomerism in Coordination Compounds |
 89%
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Which among the following complexes can exhibit isomerism?

1. [Ag(NH3)2]+ 2. [Co(NH3)5NO2]2+
3. [Pt(en)Cl2] 4. [Co(NH3)5Cl]+

Subtopic:  Isomerism in Coordination Compounds |
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Which of the following species can act as an oxidising agent?

1. [Cr(CO)6]

2. [Ni(CO)4]

3. [Mn(CO)6]+

4. [V(CO)6]

Subtopic:  E.A.N |
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Among the following compounds, the paramagnetic compound with two unpaired electrons is:

1. K3[Fe(CN)6]

2. K2[NiCl]4

3. K2[CoCl4]

4. Na2[Ni(CN)4]

Subtopic:  VBT, CFT & their Limitations |
 80%
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When 0.1 mol of CoCl3(NH3)5 is treated with an excess of AgNO3, 0.2 mol of AgCl is obtained. The conductivity of the solution will correspond to:

1. 1:3 electrolyte 2. 1:2 electrolyte
3. 1:1 electrolyte 4. 3:1 electrolyte
Subtopic:  Werner’s Theory |
 77%
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The most stable complex species is : 

1. FeCO5

2. FeCN63-

3. FeC2O433-

4. FeH2O6+3

Subtopic:  Ligands |
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