Important Questions From General Principles And Processes Of Isolation Of Elements are very important for NEET, JEE as well as AIIMS exam. This is because it has many questions based on isolation of elements like hydrogen, chlorine, bromine and iodine from their respective mixtures. It tests your ability to isolate these elements through tests like vaporization, electrolysis and bulb method.
Important Questions From General Principles And Processes Of Isolation Of Elements (Electrochemical Principles of Metallurgy)
1. What is the anode and cathode used in Hall-Heroult process?
a) Zinc and copper
b) Iron and copper
c) Carbon and zinc
d) Graphite and carbon
Answer: Graphite and carbon
2. In the metallurgy of aluminium, purified bauxite is mixed with Na2AlF6.
a) True
b) False
Answer: False
3. What is the net reaction in Hall-Heroult process?
a) 2Al2O3 + 3C → 4Al + 3CO2
b) 4Al2O3 + 3C → 4Al + 6CO2
c) F2 + Al2O3 → Al + F2O3
d) Na3AlF6 → AlF3 + 3NaF
Answer: 2Al2O3 + 3C → 4Al + 3CO2
4. What is the temperature maintained in Hall-Heroult process?
a) 800°-840° C
b) 840°-880° C
c) 900°-940° C
d) 940°-980° C
Answer: 940°-980° C
5. Electrochemical processes in metallurgy are spontaneous.
a) True
b) False
Answer: True
6. Which of the following is an example of electrochemical principles of metallurgy?
a) Baeyer’s process
b) Solvay process
c) Bergius process
d) Hall-Heroult process
Answer: Hall-Heroult process
7. Which of the following is the most suitable ore to undergo electrochemical process?
a) Kaolinite
b) Calamine
c) Bauxite
d) Cinnabar
Answer: Bauxite
8. Which of the following metals are reduced from molten salt solutions by electrolysis?
a) Aluminium
b) Silver
c) Iron
d) Zinc
Answer: Aluminium
9. What is the process used to extract sodium from halide ores such as sodium chloride (NaCl)?
a) Pyro metallurgy
b) Hydro metallurgy
c) Electro metallurgy
d) Magnetic separation
Answer: Electro metallurgy
10. What is the term given to the extraction of aluminium from bauxite by using electrochemical process?
a) Baeyer’s process
b) Hall-Heroult process
c) Mc-Arthur process
d) Blasts process
Answer: Hall-Heroult process