51.

Identify the statement which is not correct regarding CuSO₄

• It react with KI to give iodine

• It react with KCl to give Cu₂Cl₂

• It react with NaOH and glucose to give Cu₂O.

• It gives CuO on strongly heating in air.

Transition metals usually exhibit highest oxidation states in their

• chlorides

• fluorides

• bromides

• iodides

Which one of the following sets correctly represents the increase in the paramagnetic property of the ions?

• Cu²⁺ > V ²⁺ > Cr²⁺ > Mn²⁺

• Cu²⁺ < Cr²⁺  < V ²⁺ < Mn²⁺

• Cu²⁺ < V ²⁺ < Cr²⁺ < Mn²⁺

• V ²⁺ < Cu²⁺  < Cr²⁺ < Mn²⁺

Which of the following is not a characteristic of transition elements?

• Variable oxidation states

• Formation of coloured compounds

• Formation of interstitial compounds

• Natural radioactivity

The magnetic moment of a salt containing Zn²⁺ ion is

• 0

• 1.87

• 5.92

• 2

Which of the following complex has zero magnetic moment (spin only)?

• [Ni(NH₃)₆]Cl₂

• Na₃[FeF₆]

• [Cr(H₂O)₆]SO₄

• K₄[Fe(CN)₆]

Among the following the compound that is both paramagnetic and coloured is :

• K₂Cr₂O₇

• (NH₄)₂(TiCl₆)

• VOSO₄

• K₃[Cu(CN)₄]

Which of the following is diamagnetic in nature ?

• [Fe(CN)₆]^3-

• ${\mathrm{NiCl}}_4^{2-}$

• [Ni(CO)₄]

• [MnCl₄]^2-

Which of the following is an amphoteric oxide?

• SO₃

• Mg

• Al₂O₃

• P₄O₁₀

The point of dissimilarity between lanthanides and actinides is

• three outermost shells are partially filled

• they show oxidation state of + 3 (common)

• they are called inner transition elements

• they are radioactive in nature