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Q.

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.

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a

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

b

(a), (c) and (d) only

c

(b), (c) and (d) only

d

(c) and (d) only

answer is A.

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Detailed Solution

(a) CaCO3⟶CaO+CO2 during the extraction of iron in blast furnace reduction(b) During extraction of silver, leaching of Ag2S with NaCN gives NaAg(CN)2 which is anionic complex of silver.(c) Nickel is purified by Mond’s process(d) Zr and Ti are purified by Van Arkel method

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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.