Write the IUPAC name of the following complex : [Co(NH₃)₅(CO₃)]Cl.

Write the coordination number and oxidation state of Platinum in the complex [Pt(en)₂Cl₂].

Write the formula of the following coordination compound :
Iron(III) hexacyanoferrate (II)

What type of isomerism is exhibited by the complex [Co(NH₃)₅ Cl]SO₄?

Write the hybridisation and number of unpaired electrons in the complex [CoF₆]^3-.

Atomic No. of Co = 27

Identify the chiral molecule in the following pair :

Sc³⁺ is colourless in aqueous solution whereas Ti³⁺ is coloured.

Give reason:

When Cl₂ reacts with an excess of F₂. ClF₃ is formed and not FCl₃

329.

The number of unpaired electrons in[NiCl₄]^2-, Ni(CO)₄ and (Cu(NH₃)₄]²⁺ respectively are

• 0, 2, 1

• 2, 0, 1

• 0, 2, 1

• 2, 2, 0

The pair having the same magnetic moment is:

[At. No. : Cr=24, Mn=25, Fe=26, Co=27]

• [Cr(H2O)₆ ]²⁺ and [Fe(H₂O)₆ ]²⁺

• [Mn(H₂O)₆ ]²⁺ and [Cr(H₂O)₆ ]²⁺

• [CoCl₄ ]²⁻ and [Fe(H₂O)₆ ]²⁺

• [CoCl₄ ]²⁻ and [Fe(H₂O)₆ ]²⁺