Transitional elements are mostly

• diamagnetic

• paramagnetic

• neither diamagnaetic nor paramagnetic

• diamagentic and paramagnetic both

492.

Which of the following has the highest value of solubility product?

• CuS

• Bi₂S₃

• CdS

• ZnS

Atomic radii of Ti, Zr and Hf vary

• Ti>Zr> Hf

• Ti<Zr< Hf

• Ti< Hf<Zr

• Ti<Zr=HF

Which of the following radicals will not be precipitated by passing H₂S in concentrated acid solution?

• Copper

• Antimony

• Arsenic

• Cadmium

In which of the following solvents, AgBr will have the highest solubility?

• 10^-3 M NaBr

• 10^-3 M NH₄OH

• Pure water

• 10^-3 M HBr

Which transition element of the following outermost electronic configuration shows the highest oxidation state?

• 3d³, 4s²

• 3d⁵, 4s¹

• 3d⁵, 4s²

• 3d⁶, 4s²

Which of the following two ions have the same number of unpaired electrons ?

(1) Mn³⁺       (2) Fe³⁺      (3) Cr³⁺      (4) Co³⁺

• (2) and (3)

• (3) and (4)

• (1) and (2)

• (1) and (4)

The lanthanoid contraction is responsible for the fact that

• Zn and Y have about same radius

• Zr and Nb have similar oxidation states

• Zr and Hf have about the same radius

• Zr and Zn have the same oxidation state

The equivalent weight of MnSO₄, is equal to its molecular weight when it is converted to

• Mn₂O₃

• MnO₂

• MnO${}_4^{-}$

• MnO${}_4^{2-}$

The mineral from which potassium permanganate is manufactured

• manganite, Mn₂O₃.H₂O

• pyrolusite, MnO₂

• Both (a) and (b)

• None of the above