421.

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

The general electronic configuration of the transition elements is

• (n-1)d¹⁰, (n+1)s²

• (n- 1)d^1-10, (n + 1)s^1-2

• (n- 1)d^1-10, np⁶,ns²

• (n- 1)d^1-10, ns^1-2

Which of the following ions is colourless in solution?

• V³⁺

• Cr³⁺

• Co²⁺

• Sc³⁺

Most common oxidation states of Ce (cerium) are

• +3, +4

• +2, +3

• +2, +4

• +3, +5

Most basic hydroxide among the following is

• Lu(OH)₃

• Eu(OH)₃

• Yb(OH)₃

• Ce(OH)₃