General Principles and Processes of Isolation of Elements - Online Test

Q1. In the froth floatation process for the concentration of ore, the particles float because
Answer : Option B
Explaination / Solution:

In froth floatation ore particles get wetted with oil and comes to the surface with froath.

Q2. Which among the following act as forth stabilizer?
Answer : Option D
Explaination / Solution:

Aniline stabalises the froath.

Q3. Which among the following is a chemical process?
Answer : Option B
Explaination / Solution:

Leaching is a process in which ore is digested with a solvent to form a soluble complex.

Q4. Impurities associated with Bauxite ore is/are
Answer : Option A
Explaination / Solution:

Bauxite ore have silica, TiO2 and Fe2O3 as impurity.
Q5. Which among the following act as flux , if iron oxide is present as an impurity?
Answer : Option D
Explaination / Solution:

Iron oxide is basic oxide so flux should be acidic.

Q6. Which of the following metals cannot be extracted by smelting process?
Answer : Option A
Explaination / Solution:

Al cannot be extracted by smelting.

Q7. The furnace which gives the highest temperature is
Answer : Option D
Explaination / Solution:

Blast furnance maintains the highest temperature.

Q8. At 1123 K temperature in the blast furnace , CO reduces
Answer : Option B
Explaination / Solution:

At this Temp range free energy for the process is negative.

Q9. Which among the following is not a basic flux?
Answer : Option A
Explaination / Solution:

SiO2 is acidic flux because Si is non metal.
Q10. The distillation process is used for the purification of
Answer : Option B
Explaination / Solution:

Hg is purified by distillation.