Class 12 Chemistry General Principles and Processes of Isolation of Elements MCQs
These CBSE Class 12 Chemistry General Principles and Processes of Isolation of Elements MCQs are prepared by our Chemistry Expert. By practicing following MCQs, students will be able to quickly revise all the concepts of the CBSE 12 Chemistry General Principles and Processes of Isolation of Elements MCQs. Additionally, CBSE Class 12 Chemistry General Principles and Processes of Isolation of Elements MCQs will be helpful for JEE And NEET Aspirants.
Refer to our Chemistry class 12 MCQs for scoring Excellent Marks in your Exams.
Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements MCQs (SET A)
1) Which is not iron ore?
(1) Hematite
(2) Siderite
(3) Dolomite
(4) Limonite
Answer:- Dolomite
2) Which is the sulphate ore of Mg?
(1) Dolomite
(2) Chlorophyll
(3) Epsomite
(4) Carnallite
Answer:- Epsomite
3) Which of the following metal is not extracted by leaching?
(1) Aluminium
(2) Mercury
(3) Silver
(4) Gold
Answer:- Mercury
4) Which contains both iron and copper?
(1) Cuprite
(2) Chalcocite
(3) Chalcopyrite
(4) Malachite
Answer:- Chalcopyrite
5) Which of the following is not a concentration technique?
(1) Levigation
(2) Froth-floatation
(3) Leaching
(4) Calculation
Answer:- Calculation
6) Zincite and calamine respectively are
(1) Oxide and carbonate ore of Zn
(2) Carbonate and oxide ore of Zn
(3) Oxide and sulphate ore of Zn
(4) Sulphate and sulphite ore of Zan
Answer:- Oxide and carbonate ore of Zn
7) Which of the following is chalcopyrite?
(1) CuFeS2
(2) FeS2
(3) KMgCl3.6H2O
(4) Al2O3.2H2Order
Answer:- CuFeS2
Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements MCQs (SET B)
1) Which of the following does not contain aluminium?
(1) Cryolite
(2) Fluorspar
(3) Feldspar
(4) Micha
Answer:- Fluorspar
2) Most important ore of tin is
(1) Cassiterite
(2) Cryolite
(3) Malachite
(4) all three
Answer:- Cassiterite
3) The rocky and silicious matter associated with an ore is called
(1) Slag
(2) Mineral
(3) Gangue
(4) Flux
Answer:- Gangue
4) Consider
(i) Copper blende = Cu2O
(ii) Pyrolusite = MnO2
(iii) Cryolite = Na3AlF6
(iv) Cinnabar = PbS
Which is/are not correctly matched –
(1) i only
(2) ii only
(3) iv only
(4) i and Iv
Answer:- i and Iv
5) Bauxite has the formula
(1) Al2O3.H2O
(2) Al2O3.2H2O
(3) Al2O3.3H2O
(4) none
Answer:- Al2O3.2H2O
6) In froth floatation, the oil used is
(1) Olive oil
(2) Pine oil
(3) Coconut oil
(4) Mustard oily
Answer:- Pine oil
7) Baeyer’s process is used for the purification of Bauxite containing ……. as an impurity
(1) Silica
(2) Rutile
(3) Fe2O3
(4) Nine
Answer:- Fe2O3
Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements MCQs (SET C)
1) Which one of the following is not a basic flux
(1) CaCO3
(2) CaO
(3) SiO2
(4) MgO
Answer:- SiO2
2) Copper matte consists of
(1) Copper oxide and ferrous sulphide
(2) Copper sulphide and ferrous oxide
(3) Copper sulphide and ferrous sulphide
(4) Copper oxide and ferrous oxide
Answer:- Copper sulphide and ferrous sulphide
3) Matter is obtained after this step
(1) Froth floatation
(2) Roasting
(3) Smelting
(4) Refining
Answer:- Roasting
4) In the metallurgical process, the flux used for removing acidic impurities is
(1) Silica
(2) Sodium chloride
(3) Limestone
(4) Sodium Carbonate
Answer:- Limestone and Sodium Carbonate
5) The process in which metal oxide is reduced to metal by Al is called
(1) Smelting
(2) Aluminothermy
(3) Hydrothermy
(4) No specific names
Answer:- Aluminothermy
6) By the cupellation of Pb + Ag we obtain
(1) Pure silver
(2) Pure lead
(3) Impure silver
(4) Impure lead
Answer:- Pure silver
7) During extraction of Ag which of the following substance is formed?
(1) Na[Ag(CN)2]
(2) Na2[Ag(CN)2]
(3) Na4[Ag(CN)2]
(4) None
Answer:- Na[Ag(CN)2
Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements MCQs (SET D)
1) Iron obtained from a blast furnace is
(1) Wrought iron
(2) Cast iron
(3) Pig iron
(4) Steel
Answer:- Pig iron.
2) Which process is not used for Al extraction?
(1) Van Arkel
(2) Serpeck
(3) Bayer
(4) none
Answer:- Van Arkel
3) The impurities of CaO can be removed by
(1) SiO2
(2) P2O5
(3) Both
(4) None
Answer:- Both
4) In metallurgical processes, the flux used for removing acidic impurities is
(1) Silica
(2) Sodium chloride
(3) Limestone
(4) Sodium Carbonate
Answer:- Limestone and Sodium Carbonate
5) The volatile metal can be purified by
(1) Liquation
(2) Distillation
(3) Cupellation
(4) Besemerisation
Answer:- Distillation
6) In the extraction of aluminium by Hall-Heroult process, purified Al2O3 is mixed with CaF2 is
(1) Lower the melting point of Al2O3
(2) Increase the conductivity of the molten mixture
(3) Reduce Al3+ into Al(s)
(4) Acts as a catalyst
Answer:- Lower the melting point of Al2O3 and Increase the conductivity of the molten mixtures
7) The silver complex formed during cyanide process is
(1) Na2[Ag(CN)]
(2) Na[AgCN]
(3) Na2[Ag(CN)]2
(4) Na[Ag(CN)2]
Answer:- Na[Ag(CN)2]
Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements MCQs (SET E)
1) Which of the following oxide is least stable?
(1) CO2
(2) CO
(3) MgO
(4) HgO
Answer:- HgO
2) Electrolytic reduction method is used for the extraction of
(1) Highly electronegative elements
(2) Transition metals
(3) Highly electropositive elements
(4) Metalloids
Answer:- Highly electropositive elements.
3) When molten NaCl is electrolysed by using an electrode, the product obtained at the cathode is
(1) Na
(2) Cl2
(3) H2
(4) Na-Hg amalgam
Answer:- Na.
4) In the blast furnace this is acting as a reducing agent at the lower part
(1) CO
(2) H2
(3) C
(4) None
Answer:- C.
5) Which of the following is not a refining process?
(1) Mond’s process
(2) Van Arkel process
(3) Poling
(4) Leaching
Answer:- Leaching.
6) From gold amalgam, gold may be recovered by
(1) Distillation
(2) Oxidation
(3) Electrolytic refining
(4) Dissolving in HNO3
Answer:- Distillation.
7) Tin and lead can be refined by
(1) Distillation
(2) Liquation
(3) Levigation
(4) Leaching
Answer:- Liquation.
Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements MCQs (SET F)
1) Refining of silver is done by
(1) Liquation
(2) Poling
(3) Cupellation
(4) Van Arkel method
Answer:- Cupellation.
2) Mond’s process is used for refining
(1) Ni
(2) Co
(3) NH3
(4) H2so
Answer:- Ni.
3) Mac-Arthur Forrest process is used for the extraction of
(1) Zn
(2) Cu
(3) Fe
(4) Ag
Answer:- Ag.
4) Tin and Lead can be refined by
(1) Distillation
(2) Liquation
(3) Levigation
(4) Leaching
Answer:- Liquation.
5) Choose the incorrect option.
(1) Fractional distillation is used when there is a difference in densities of ore and gangue.
(2) Mond’s process is used for the purification of Ni.
(3) Matte is (Cu2S + FeS)
(4) Heating of mild steel in presence of NH
Answer:- Fractional distillation is used when there is a difference in densities of ore and gangue.
6) Identify the incorrect statement.
(1) Aluminothermy is the process of reduction during the extraction of Al.
(2) At lower temperatures carbon and at higher temperatures, CO is a good reducing agent.
(3) Decomposition of metal carbonyl is followed in the monds process for purification of Ni.
(4) Zirconium is purified by the Van Arkel process.
Answer:- Aluminothermy is the process of reduction during extraction of Al and At lower temperatures carbon and at higher temperatures, CO is a good reducing agent.
7) Carbon cannot be used to produce magnesium by chemical reduction of MgO because
(1) Carbon is not a powerful reducing agent.
(2) Magnesium reacts with carbon to form carbides.
(3) Magnesium is less electropositive than carbon.
(4) Carbon is a non-metal.
Answer:- Magnesium reacts with carbon to form carbides.
8) Which of the following is a better reducing agent at 673K in pyro metallurgy?
(1) C
(2) CO2
(3) CO
(4) None
Answer:- CO.
We hope you liked our Class 12 Chemistry General Principles and Processes of Isolation of Elements MCQs. If you have any queries regarding Class 12 Chemistry General Principles and Processes of Isolation of Elements Amines MCQs , drop a comment below and we will reply to you at the earliest.
General Principles and Processes of Isolation of Elements Class 12 Notes Chemistry Chapter 6
Class 12 Chemistry 13 Amines MCQs
Class 12 Chemistry Chapter Alcohols, Phenols and Ethers MCQs