Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Why is adsorption always exothermic?

Silver atom has completely filled d orbitals (4d¹⁰) in its ground state. How can you say that it is a transition element?

Explain giving reason:

Transition metals and many of their compounds show paramagnetic behaviour.

Write down the electronic configuration of Cr³⁺.

Write down the electronic configuration of Pm³⁺.

Write down the electronic configuration of Cu⁺.

Write down the electronic configuration of Ce⁴⁺.

Write down the electronic configuration of Co²⁺.

Write down the electronic configuration of Lu²⁺.

Write down the electronic configuration of Mn²⁺.

Write down the electronic configuration of Th⁴⁺.

Explain the following, giving two examples:

Coordination entity

What is meant by unidentate ligand?

What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper sulphate? Why is it that no precipitate of copper sulphide is obtained when H₂S(g) is passed through this solution?

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

K₃[Co(C₂O₄)₃]

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

cis-[CrCl₂(en)₂]Cl

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

(NH₄)₂[CoF₄]

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

[Mn(H₂O)₆]SO₄

Amongst the following, the most stable complex is:

Identify the monomer in the following polymeric structures.