Froth Floatation

Q.

Silvery grey iron filings are added to yellow sulphur powder in a test tube. The contents of the test tube were strongly heated until they glow red. On cooling, it forms a grey dull solid. Which statement is correct about the contents of the test tube in the experiment?

1. At the end, they can be separated with a magnet

2. At the end, a compound is formed

3. At the start, they cannot be separated with a magnet

4. At the start, there is a compound

Q. How is seperating funnel involved in seperating iron from its ore ??

Q. Which among the following ores is concentrated by froth floatation?

1. Bauxite
2. Zincite
3. Galena
4. Magnetite

Q.

Which of the following can be classified as methods of concentration of ore?

1. Gravity separation

2. Froth floatation

3. Rusting

4. Filtering

Q.

In the ore Bauxite $A{l}_2{O}_3.2H_{2}O$ there are two significant types – Red Bauxite and White Bauxite. Bayer’s process is applicable for __ Bauxite.