Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?

Related Mcqs:

1. Electrostatic separation of minerals from each other is based on their differences in the following property ?

   A. Densities
   B. Magnetic permeabilities
   C. Electrical conductivities
   D. Hardness

2. Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of _______________ hardness?

   A. Scratch
   B. Indentation
   C. Dynamic
   D. Rebound

3. Which of the following is an ore dressing operation ?

   A. Classification
   B. Smelting
   C. Roasting
   D. None of these

4. Which of the following is not categorised as the ore agglomeration process ?

   A. Nodulising
   B. Pelletising
   C. Balling
   D. Briquetting

5. Which of the following is not an ore of copper ?

   A. Cryolite
   B. Azurite
   C. Chalcopyrite
   D. Malachite

6. Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore ?

   A. High fusibility & fluidity
   B. High thermal conductivity
   C. Low density
   D. High chemical activity

7. Which of the following if present in iron ore, enhances its value ?

   A. Alumina
   B. Alkali oxide
   C. Lime & Magnesia
   D. None of these

8. Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________?

   A. Lumps
   B. Pellets
   C. Briquettes
   D. Sinter

9. The product (s) of roasting of a sulphide ore is (are) ?

   A. Oxide only
   B. Sulphate only
   C. Oxide and sulphate
   D. Dependent on temperature and partial pressure of oxygen & sulphur dioxide

10. Cassiterite is an ore of_________________?

    A. Tin
    B. Lead
    C. Molybdenum
    D. Chromium