Question

Given below are two statements :
Statement I: Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper.
Statement II: It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a froth flotation method.

• A. Both Statement I and Statement II are true.
• B. Both Statement I and Statement II are false.
• C. Statement I is true but Statement II is false.
• D. Statement I is false but Statement II is true.

Hint:

Remember the names and formulas of important ores (like Sphalerite, Galena, Copper Glance, Bauxite, Hematite). For separation techniques, understand the underlying principle. Froth flotation is specific to sulphide ores and can be made selective using activators and depressants.

Answer 1

The Correct Option is A

Let's evaluate each statement provided in the question:

1. Statement I: "Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper."
   - Sphalerite (ZnS) is indeed a sulphide mineral and a primary ore of zinc.
   - Copper glance, also known as chalcocite (Cu₂S), is a sulphide ore of copper.
   Therefore, Statement I is true.
2. Statement II: "It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a froth flotation method."
   - The froth flotation method is commonly used to separate hydrophobic materials from hydrophilic ones and is widely applied for the separation of sulphide ores.
   - Depressants are chemicals that selectively prevent certain types of particles from forming froth, thus helping to separate two similar sulphide ores in the flotation process.
   Therefore, Statement II is true.

Since both statements accurately describe facts related to sulphide ores and their separation, the correct answer is:
Both Statement I and Statement II are true.