The correct statement is :
Show Hint
- zincite is a carbonate ore.
- Sodium cyanide cannot be used in the metallurgy of silver.
- aniline is a froth stabilizer.
- zone refining process is used for the refining of titanium.
The Correct Option is C
Solution and Explanation
(2) Silver (and gold) are leached with dilute NaCN solution as Na[Ag(CN)2] (cyanide process): so NaCN can be used: false.
(3) In froth flotation, cresols and aniline are added as froth stabilisers: true.
(4) Zone refining is used for semiconductor-grade Ge, Si, Ga, B; titanium is refined by the van Arkel method (iodide decomposition): false.
Answer: (3) aniline is a froth stabilizer.
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