Processes of Isolation of Elements-4
Chemistry Class 12 Science

MCQ Questions Class 12 General Principles and Processes of Isolation of Elements With Answers

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CBSE Class 12 General Principles and Processes of Isolation of Elements Multiple Choice Questions with Answers. MCQ Questions Class 12 General Principles and Processes of Isolation of ElementsĀ with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 General Principles and Processes of Isolation of ElementsĀ MCQs with Answers to know their preparation level.

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Students who are searching for NCERT MCQ Questions for Class 12 General Principles and Processes of Isolation of ElementsĀ with Answers are compiled here to get good practice on all fundamentals. Know your preparation level on MCQ Questions for Class 12 General Principles and Processes of Isolation of ElementsĀ with Answers. You can also verify your answers from our provided MCQ Class 12 General Principles and Processes of Isolation of ElementsĀ with Answers. So, ace up your preparation with MCQ of Class 12 Chemistry Examinations.

MCQ Questions Class 12 General Principles and Processes of Isolation of Elements with Answers - Set - 4

Question 1:Ā 

The powdered ore is agitated with water or washed with running stream of water. The heavy ore particles and lighter impurities are separated. This method of concentration is known as
(a) metallurgy
(b) leaching
(c) froth floatation process
(d) gravity separation

Correct Answer – (D)

Question 2 :Ā 

Removal of the unwanted materials like sand, clays, etc. from the ore is known as ā€¦ā€¦ā€¦., ā€¦ā€¦.. or ā€¦ā€¦ā€¦.
(a) concentration, dressing, benefaction
(b) separation, refining, gangue
(c) magnetic separation, purification, gangue
(d) washing, refining, amalgamation

Correct Answer – (A)

Question 3 :Ā 

Formula of copper pyrite is
(a)Cu2S
(b) CuFeS
(c) CuFeS2
(d) Cu2Fe2S2

Correct Answer – (C)

Question 4 :Ā 

Concentration of sulphide ore is done by
(a) froth flotation process
(b) electrolysis
(c) roasting
(d) None of these

Correct Answer – (A)

Question 5 :Ā 

The main reactions occurring in blast furnaceĀ during extraction of iron from haematiteĀ are________.
(i) Fe2O3Ā + 3COĀ ā†’ 2Fe + 3CO2
(ii) FeO + SiO2Ā ā†’ FeSiO3
(iii) Fe2O3 + 3CĀ ā†’ 2Fe + 3CO
(iv) CaO + SiO2Ā ā†’ CaSiO3
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (i), (ii) and (iii)

Correct Answer – (C)

MCQ Questions Class 12 General Principles and Processes of Isolation of Elements with Answers

Question 6:Ā 

For which of the following ores froth floatation method is used for concentration?
(a) Haematite
(b) Zinc blende
(c) Magnetite
(d) Camallite

Correct Answer – (B)

Question 7:Ā 

Ore of aluminium is
(a) bauxite
(b) hematite
(c) dolomite
(d) None of these

Correct Answer – (A)

Question 8:Ā 

Malachite is an ore of
(a) iron
(b) copper
(c) zinc
(d) Sliver

Correct Answer – (B)

Question 9:Ā 

2CuFeS2Ā +O2Ā ā†’Cu2S + 2FeSĀ +Ā SO2Ā Which process of metallurgy of copper isĀ represented by above equation?Ā 
(a) Concentration
(b) Roasting
(c) Reduction
(d) Purification

Correct Answer – (B)

Question 10:Ā 

Sulfide ores are common for the metalsĀ 
(a) Ag, Cu and Pb
(c) Ag, Cu and Sn
(b) Ag, Mg and Pb
(d) Al, Cu and Pb

Correct Answer – (A)

MCQ Questions Class 12 General Principles and Processes of Isolation of Elements with Answers
Set 1
Set 2
Set 3
Set 4
Set 5

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