HSC Science इयत्ता १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Transition metals show high melting points why?

Oxidation state of Iron and the charge on the ligand NO in [Fe(H₂O)₅NO]SO₄ are ____________.

In which of the following coordination entities the magnitude of Δ₀ will be maximum?

Give an example of coordination compound used in medicine and two examples of biologically important coordination compounds.

Based on VB theory explain why \[\ce{[Cr(NH3)6]^3+}\] is paramagnetic, while \[\ce{[Ni(CN)4]^2-}\] is diamagnetic.

[Ti(H₂O)₆]³⁺ is coloured, while [Sc(H₂O)₆]³⁺ is colourless – explain.

Classify the following ligand based on the number of donor atoms.

NH₃

Classify the following ligand based on the number of donor atoms.

en

Classify the following ligand based on the number of donor atoms.

ox²⁻

Classify the following ligand based on the number of donor atoms.

pyridine

What is the coordination entity formed when excess of liquid ammonia is added to an aqueous solution of copper sulphate?

On the basis of VB theory explain the nature of bonding in \[\ce{[Co(C2O4)3]^3-}\].

Graphite and diamond are ____________.

An ionic compound A_xB_y crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying corners of the cube. the correct formula of A_xB_y is

Solid CO₂ is an example of ____________.

Assertion: monoclinic sulphur is an example of a monoclinic crystal system

Reason: for a monoclinic system, a ≠ b ≠ c and α = γ = 90°, β ≠ 90°

In calcium fluoride, having the flurite structure the coordination number of Ca²⁺ ion and F⁻ Ion are ____________.

The ionic radii of A⁺ and B⁻ are 0.98 × 10⁻¹⁰ m and 1.81 × 10⁻¹⁰ m. The coordination number of each ion in AB is ______.

Define unit cell.

Give any three characteristics of ionic crystals.