General Principles & Processes Of Isolation Of Elements
Time: 30 Minute
- 1.The most abundant metal in the earth’s crust is:
- A.
Sodium
- B.
Calcium
- C.
Aluminum
- D.
Iron
- 2.Name the process in which, an upward stream of running water is used to wash the powdered ore:
- A.
Magnetic Separation
- B.
Gravity Separation
- C.
Froth Floatation Process
- D.
Calcinations
- 3.The function of pine oil in Froth Floatation Process is to:
- A.
Stabilise the froth formed.
- B.
Separate two sulphide ores
- C.
Recover the ore particles.
- D.
Enhance non-wettability of the mineral particles
- 4.______ is an ore of aluminum:
- A.
Sand
- B.
Clay
- C.
Haematite
- D.
Zincite
- 5.Which of the following contains both Ca and Mg:
- A.
Limestone
- B.
Dolomite
- C.
Chalk
- D.
Feldspar
- 6.Drying agent who react with CO2 and removes water vapours is:
- A.
CaO
- B.
![]()
- C.
![]()
- D.
![]()
- 7.The slag is formed by:
- A.
Gangue particles
- B.
Main ore
- C.
Ore and Gangue particles
- D.
None of the above
- 8.______ is used to make interpretations and predict which element will suit as the reducing agent for a given metal oxide:
- A.
Enthalpy
- B.
Entropy
- C.
Gibb’s Energy
- D.
Specific Heat
- 9.Refining process is used in:
- A.
![]()
- B.
![]()
- C.
![]()
- D.
In all the above
- 10.Highly electropositive metals cannot be extracted by carbon reduction process, because these:
- A.
Metals combine with carbon to form carbide
- B.
Metals do not react with carbon
- C.
Metal oxides are not reduced by carbon
- D.
Metals are not reduced by
- 11.Which metal cannot be obtained by electrolysis of their aqueous solution:
- A.
Ag
- B.
Mg
- C.
Cu
- D.
Pt
- 12.Froth Floatation method may be used to increase the concentration of mineral in:
- A.
Chalcophyrite
- B.
Bauxite
- C.
Haematite
- D.
Calamine
- 13.
![Which of the following can be used to give above 3000 temperature:
- ProProfs]( "Which of the following can be used to give above 3000 temperature:")
Which of the following can be used to give above 3000 temperature:- A.
Blast furnace
- B.
Arc furnace
- C.
Muffle furnace
- D.
Reverberatory furnace
- 14.Predict the method which is based on the principle of difference in melting point of the metal and the impurities:
- A.
Zone refining
- B.
Electrolytic refining
- C.
Liquation
- D.
Distillation
- 15.Mg can reduce SiO2 to Si, when:
- A.
Gibb’s energy remains constant
- B.
Enthalpy remains constant.
- C.
Temperature is less than ΔH / ΔS
- D.
Temperature is greater than ΔH / ΔS
Questions: 9 | Attempts: 938 | Last updated: Aug 7, 2013
-
Sample QuestionOn which river bank is Ahmedabad state situated?
Questions: 30 | Attempts: 4849 | Last updated: Jun 4, 2020
-
Sample QuestionWhich of the following is/are the nature of the power of taxation? It is an inherent attribute of sovereignty. It is legislative in character. It is regarded as comprehensive, unlimited, plenary and supreme.
Questions: 10 | Attempts: 274 | Last updated: Nov 2, 2017
-
Sample QuestionThe instructions that tell the computer what to do and how to do it.
Back to top