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+1 vote
12.1k views
in Chemistry by (46.9k points)

Among statements (a) -(d), the correct ones are : 

(a) Lime stone is decomposed to CaO during the extraction of iron from its oxides. 

(b) In the extraction of silver, silver is extracted as an anionic complex. 

(c) Nickel is purified by Mond's process. 

(d) Zr and Ti are purified by Van Arkel method. 

(1) (c) and (d) only 

(2) (a), (c) and (d) only 

(3) (b), (c) and (d) only 

(4) (a), (b), (c) and (d)

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1 Answer

+1 vote
by (49.1k points)

(a) CaCO3 + Δ → CaO + CO2 {In Blast furnace} lime stone 

(b) Ag form cyanide complex [Ag(CN)2] – during cyaride process 

Ag / Ag2S + CNΘ → [Ag(CN)2]-

(c) Ni is purified by mond's process 

(d) Zr and Ti are purified by van arkel method 

All (a), (b), (c), (d) are correct statements 

Thus correct option is (4)

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