(A)

Cr + Ni

(B)

Cr + Zn

(C)

Zn + Pb

(D)

Fe + Cr + Ni

(A) CuCN

(B)[Cu(CN)₄]^3-

(C)[Cu(CN)₄]^2-

(D)Cu(CN)₂

(A)

silver nitrate

(B)

silver bromide

(C)

sodium chloride

(D)

oleic acid

(A) There is a decrease in the radii of the atoms or ions as one proceeds from La or Lu.

(B)Lanthanide contraction is the accumulation of successive shrinkages

(C)As a result of lanthanide contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements.

(D)Shielding power of 4f electrons is quite weak

(A)

³/₂

(B)

⁴/₅

(C)

⁵/₄

(D)

⁸/₃

(A)

Ti³⁺, V²⁺, Cr³⁺, Mn⁴⁺

(B)

Ti⁺, V⁴⁺, Cr⁶⁺, Mn⁷⁺

(C)

Ti⁴⁺, V³⁺, Cr⁶⁺, Mn³⁺

(D)

Ti²⁺, V³⁺, Cr⁴⁺,Mn⁵⁺

(A)

a thin layer of Ag is formed on Cu

(B)

more voltage is required

(C)

Ag⁺ ions are completely removed from solution

(D)

less availability of Ag⁺ ions, as Cu cannot displace Ag from [Ag(CN)₂]^- ion

(A)

La(OH)₃ is less basic than Ln(OH)₃

(B)

In lanthanide series ionic radius of Ln^3- ion decreases.

(C)

La is actually an element of transition series rather lanthanide

(D)

Atomic radius of Zr and Hf are same because of lanthanide contraction

(A)

Lu

(B)

Pm

(C)

Pr

(D)

Gd

(A)

Cu + Pb

(B)

Cu + Sn

(C)

Cu + Zn

(D)

Cu + Ni