Gallium and Indium can be prepared by:
Zone refining
The correct answer is (a) Zone refining. Gallium and indium are typically purified using the zone refining method. This method involves the repeated melting and solidification of the metal, and since impurities are more soluble in the liquid phase, they are effectively concentrated in the molten portion and then separated. Other methods like vapor phase refining or the Mond process are used for purifying different metals but are not typically used for gallium and indium.
Important Questions from Coordination Compounds
Match List-I with List-II:
List-I List-II (A) Mn2+ (I) Pyrolusite ore (B) Spin only Magnetic Moment (II) An alloy of 4f metal, iron and traces of S, C, Al and Ca (C) MnO2 (III) µs = √(n(n + 2)) BM (D) Misch metal (IV) Highest oxidation states Choose the correct answer from the options given below:
Match List-I with List-II:
List-I List-II (A) Diamagnetic solid (I) CrO₂ (B) Ferromagnetic solid (II) Fe₃O₄ (C) Antiferromagnetic solid (III) NaCl (D) Ferrimagnetic solid (IV) MnO Choose the correct answer from the options given below:
[NiCl₂(PPh₃)₂] is named as:
Inner orbital complex among the following is:
(A) [Co(NH₃)₆]³⁺
(B) [CoF₆]³⁻
(C) [Ni(CN)4]²⁻
(D) [MnCl₆]³⁻
(E) [FeF₆]³⁻
Choose the correct answer from the options given below:
Which will form the most stable complex?
