Chemistry - Complete d-block Question with Solution | TestHub

1) IE₁ order: Au > Cu > Ag - True

Due to relativistic contraction and poor shielding in Au, ionization enthalpy increases.

2) High melting points due to $(n-1)d+ns$ electrons - True

Strong metallic bonding involves **both $ns$ and $(n-1)d$ electrons.

3) 2ⁿᵈ & 3ʳᵈ row transition elements have higher enthalpy of atomization- True

They have stronger metallic bonding due to more effective d-orbital overlap.

4) MoO₃ and WO₃ are not strong oxidizing agents, but Cr₂O₇²⁻ is - True

Cr in +6 state is more oxidizing in aqueous medium than Mo(VI), W(VI).