Chemistry - Metallurgy Question with Solution | TestHub
Element "X" has less size & less IE than element "Y". "X" and "Y" both belong to same group. Both "X" and "Y" can be extracted from their ores via carbon reduction and oxides of both are amphoteric in nature.
"Y" can also be extracted via self reduction depending on grade of ore.
Then, the correct statement(s) is/are :
Options:(select one or more)
Answer:
Solution:
The elements are Sn (X) and Pb (Y). Both are Group 14 elements. Sn has smaller size and higher ionization energy than Pb. Both can be extracted by carbon reduction and their oxides (SnO₂, PbO) are amphoteric. Pb can undergo self-reduction.
A. Correct. Sn is extracted from cassiterite (SnO₂). Controlled roasting removes impurities like arsenic and sulfur.
B. Incorrect. Froth flotation is for sulfide ores, not typically for SnO₂.
C. Incorrect. Main ore of Sn is SnO₂ (oxide), and for Pb it's PbS (galena, sulfide).
D. Correct. Liquation refining is suitable for metals with low melting points like Sn, to separate them from higher melting impurities.
