NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice
Match the compound with the metal for which it is used for the process of extraction. (i) NaCN (a) Titanium (ii) Iodine (b) Aluminium (iii) Cryolite (c) Silver ore
Options
- A(i)-(c),(ii)-(a),(iii)-(b)
- B(i)-(c),(ii)-(b),(iii)-(a)
- C(i)-(a),(ii)-(c),(iii)-(b)
- D(i)-(b),(ii)-(a),(iii)-(c)
Correct answer
A. (i)-(c),(ii)-(a),(iii)-(b)
Step-by-step solution
(i) Role of NaCN in the extraction of silver is to do the leaching of silver ore in the presence of air from which the silver is obtained later by replacement 4 A g ( s ) + 8 C N − ( a q ) + 2 H 2 O ( a q ) + O 2 ( g ) → A g ( C N ) 2 − ( a q ) + 4 O H − ( a q ) 2 A g ( C N ) 2 − ( a q ) + Z n ( s ) → 2 A g ( s ) + Z n ( C N ) 4 2 − ( a q ) (ii) Ti + I 2 → Δ TiI 4 → Δ Ti + I 2 (Van-Arkel method) (iii) In the metallurgy of aluminium, cryolite lowers the melting point of the mixture and improves the electrical conduc