Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

• [Ni(NH₃)₆]²⁺

• [Zn(NH₃)₆]²⁺

• [Cr(NH₃)₆]³⁺

• [Cr(NH₃)₆]³⁺

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

• Red Complex has a square planar geometry

• Complex has symmetrical H- bonding

• Red complex has a tetrahedral geometry

• Red complex has a tetrahedral geometry

513.

Low spin complex of d⁶ -cation in an octahedral field will have the following energy

(Δ_o = Crystal field splitting energy in an octahedral field,
P= electron pairing energy)

• 
• 
• 
• 

The complexes [Co(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆][Co(CN)₆] are the examples of which type of which type of isomerism?

• Ionisation isomerism

• Coordination isomerism

• Geometrical isomerism

• Geometrical isomerism

The d- electron configurations of Cr³⁺, Mn²⁺ , Fe²⁺, and Co²⁺ are d⁴ ,d⁵, d⁶ and d⁷ respectively. Which one of the following will exhibit minimum paramagnetic behaviour?

(At. no. Cr = 24, Mn = 25, Fe =26, Co = 27) 

• [Fe(H₂O)₆]²⁺

• [Co(H₂O)₆]²⁺

• [Cr(H₂O)₆]²⁺

• [Cr(H₂O)₆]²⁺

Of the following complex ions, which is diamagnetic in nature?

• [Ni(CN)₄]^2-

• [CuCl₄]^2-

• [CoF₆]^3-

• [CoF₆]^3-

The complex, [Pt (Py)(NH₃)BrCl] will have how many geometrical isomers?

• 4

• 0

• 2

• 2

The sum of coordination number and oxidation number of the metal M in the complex [M(en)₂(C₂O₄)]Cl (where en is ethylenediamine) is 

• 9

• 6

• 7

• 7

The name of complex ion, [Fe(CN)₆]^3- is 

• hexacyanoiron (III) ion

• hexacyanitoferrate (III) ion

• tricyanoferrate (III) ion

• tricyanoferrate (III) ion

Which of the following carbonyl will have the strongest C- O bond? 

• (Mn(CO)₆⁺

• Cr(CO)₆

• V (CO)₆^-

• V (CO)₆^-