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.
Solution
(a) CaCO<sub>3</sub> $\buildrel \Delta \over
\longrightarrow$
CaO + CO<sub>2</sub> {In Blast furnace}
<br><br>(b) In extraction of silver, silver is extracted as an
anionic complex [Ag(CN)<sub>2</sub>]<sup>–</sup>.
<br><br>Ag/Ag<sub>2</sub>S + CN<sup>-</sup> $\to$ [Ag(CN)<sub>2</sub>]
<sup>–</sup>
<br><br>(c) Ni is purified by mond's process
<br><br>Ni + 4CO $\buildrel {330 - 350K} \over
\longrightarrow$ Ni(CO)<sub>4</sub>
<br><br>Ni(CO)<sub>4</sub> $\buildrel {450 - 470K} \over
\longrightarrow$ Ni + 4CO
<br><br>(d) Zr and Ti are purified by van arkel method
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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