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Identify the correct statement from the following :
i. In the extraction of Ag and Au, zinc is used as reducing agent.
ii. Impure zinc can be refined by distillation method.
iii. Malachite is an ore of nickel.

A

i,ii,iii

B

i, ii only

C

ii, iii only

D

i, ii only

Text Solution

Verified by Experts

The correct Answer is:
D
The explanations of given statements are as follows :
(i) IN the extraction of Ag and Au, zinc is used as reducing agent.
`2[Ag(CN)_(2)(aq) + Zn(s) rarr Ag(s) + [Zn(CN)_(4)]^(2-)(aq)]`
Thus, statement (i) is correct.
(ii) Mpure zinc can be refined by the process of distillation.
(iii) Malachite, `[Cu_(2)(CO_(3))(OH)_(2)]` is an one of copper. Thus, statement (iii) is incorrect.
Hence, correct option is (d).
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