In which of the following complex compounds the oxidation number of the metal is zero?

• [Pt(NH₃)₂Cl₂]

• [Cr(CO)₆]

• [Cr(NH₃)₃Cl₃]

• [Cr(en)₂Cl₂]

Formula of hexaaqua manganese (II) phosphate is

• [Mn(H₂O)]₆PO₄

• [Mn(H₂O)₆]₃PO₄

• [Mn(H₂O)₆]₃(PO₄)₂

• [Mn(H₂O)₆](PO₄)₃

The correct IUPAC name of [Pt(NH₃)₃Br(NO₂)Cl]Cl is

• triammine chlorobromonitroplatinum (IV) chloride

• triamminebromochloronitroplatinate (IV) chloride

• triamminebromochloronitroplatinum (IV) chloride

• triamminebromochloronitroplatinum (II) chloride

What is the magnetic moment value of Fe²⁺ ion in [Fe(CN)₆]^4- ?

• 0

• $\sqrt{3}$

• $\sqrt{24}$

• $\sqrt{8}$

The coordination number and oxidation state of Cr in K₃[Cr(C₂O₄)₃] are respectively  

• 6 and +3

• 3 and 0

• 4 and +2

• 3 and +3

Which of the following complexes is an outer orbital complex?

• [Co(NH₃)₆]³⁺

• [Fe(CN)₆]^4-

• [Ni(NH₃)₆]²⁺

• [Mn(CN)₆]^4-

IUPAC name for the complex compound K₃[Fe(CN₆)] is

• Potassium hexacyanoferrate [II]

• Potassium cynohexaferrate [II]

• Potassium hexaoyanoferrate [Ill]

• Potassium ferrocyanide iron [III]

Give the increasing order of stability in the following complexes ions 

$\underset{\mathrm{A}}{[{\mathrm{AlF}}_6{]}^{3-}} \underset{\mathrm{B}}{\left[\mathrm{Cd}\right(\mathrm{CN}{)}_4{]}^{2-}} \underset{\mathrm{C}}{\left[\mathrm{Ag}\right(\mathrm{CN}{)}_2{]}^{-}} \underset{\mathrm{D}}{\left[\mathrm{Zn}\right(\mathrm{CN}{)}_4{]}^{2-}}$

• D < C < B < A

• A < D < B < C

• A < B < C < D

• None of these

The correct representation of a complex ion is

• [Co(H₂O)(NH₃)₄Cl]²⁺

• [CoCl(H₂O)(NH₃)₄]²⁺

• [Co(NH₃)₄Cl(H₂O)]²⁺

• [Co(NH₃)₄(H₂O)Cl]²⁺

What is the value of x on the [Ni(CN)₄]^x complex ion?

• +2

• -2

• 0 (zero)

• +4