You are given a mixture of ZnS and PbS. The two compound can be separated by :
Correct answer: A. Froth flotation on adding NaCN
- A. Froth flotation on adding NaCN
- B. Electromagnetic separation
- C. Handpicking
- D. All of these
Explanation
Option A is correct. Froth flotation leverages the difference in hydrophobic properties to separate ZnS and PbS effectively. ZnS being more hydrophobic is attracted to air bubbles, while PbS sinks. The other options are incorrect as they are not suitable for separating these specific compounds.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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