General Principles and Processes of Isolation of Elements MCQ Questions for Class 12 Chemistry Chapter 6 with Answers

Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Chemistry book Chapter 6 General Principles and Processes of Isolation of Elements with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of General Principles and Processes of Isolation of Elements. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

MCQ Questions for Class 12 Chemistry With Answers

Q1. Which of the following metals is leached by Cyanide process?

(i) Ag
(ii) Na
(iii) Al
(iv) Cu

(i) Ag

Q2. Pyrolusite is an ore of

(i) Ag
(ii) Hg
(iii) Sn
(iv) Mn

(iv) Mn

Q3. Malachite is an ore of

(i) iron
(ii) copper
(iii) zinc
(iv) Sliver

(ii) copper

Q4. Which ore can be best concentrated by froth floatation process?

(i) Malachite
(ii) Cassiterite
(iii) Galena
(iv) Magnetite

(iii) Galena

Q5. Flux is used to remove :

(i) basic impurities
(ii) acidic impurities
(iii) all types of impurities
(iv) acidic and basic both impurities

(iv) acidic and basic both impurities

Q6. Pyrolusite is a/an

(i) Oxide ore
(ii) Sulphide ore
(iii) Carbide ore
(iv) not an ore.

(i) Oxide ore

Q7. The process employed for the concentration of sulphide ore is

(i) Froth floatation
(ii) Roasting
(iii) Electrolysis
(iv) Calcination

(i) Froth floatation

Q8. Ore of aluminium is

(i) bauxite
(ii) hematite
(iii) dolomite
(iv) None of these

(i) bauxite

Q9. Bessemer converter is used in the manufacture of

(i) Pig iron
(ii) Steel
(iii) Wrought iron
(iv) Cast iron

(ii) Steel

Q10. Which of the following is a carbonate ore?

(i) Pyrolusite
(ii) Malachite
(iii) Diaspore
(iv) Cassiterite

(ii) Malachite

Q11. In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2O with

(i) FeS
(ii) CO
(iii) Cu2S
(iv) SO2.

(iii)

Q12. The metal always found in free state is

(i) Gold
(ii) Silver
(iii) Copper
(iv) Sodium

(i) Gold

Q13. For which of the following ores froth floatation method is used for concentration?

(i) Haematite
(ii) Zinc blende
(iii) Magnetite
(iv) Camallite

(ii) Zinc blende

Q14. Purest form of iron is

(i) Cast iron
(ii) Hard Steel
(iii) Stainless steel
(iv) Wrought iron

(iv) Wrought iron

Q15. In metallurgical process of aluminium, cryolite is mixed with alumina in its molten state, because it

(i) decreases the amount of alumina
(ii) oxidises the alumina
(iii) increases the melting point of alumina
(iv) decreases the melting point of alumina

(iv) decreases the melting point of alumina

Q16. In the metallurgy of which of the follo wing, cupellation process is used?

(i) Copper
(ii) Silver
(iii) Iron
(iv) Aluminium

(ii) Silver

Q17. Most abundant element in earth’s crust is

(i) O
(ii) Si
(iii) Al
(iv) Fe

(i) 0

Q18. The oil used as frothing agent in froth floatation process is

(i) coconut oil
(ii) castor oil
(iii) palmitic oil
(iv) pine oil

(iv) pine oil

Q19. Which of the following benefication process is used for the mineral Al2O3.2H2O?

(i) Froth Floatation
(ii) Leaching
(iii) Liquation
(iv) Magnetic separation

(ii) Leaching

Q20. Common impurities present in bauxite ore:

(i) CuO
(ii) ZnO
(iii) Fe2O3
(iv) None of these

(iii)

Q21. Sulphide ore of zinc/copper is concentrated by

(i) floatation process
(ii) electromagnetic process
(iii) gravity separation
(iv) distillation

(i) floatation process

Q22. The Mond’s process of refining is used for which of the following metals?

(i) Gold
(ii) Copper
(iii) Iron
(iv) Nickel

(iv) Nickel

Q23. In the metallurgy of iron from haematite, limestone is added to act as

(i) flux
(ii) slag
(iii) a reducing agent
(iv) an oxidising agent

(i) flux

Q24. How do we separate two sulphide ores by froth floatation method?

(i) By using excess of pine oil
(ii) By adjusting proportion of oil to water or using depressant.
(iii) By using some solvent in which one of the sulphides is soluble
(iv) By using collectors and froth stabilisers like xanthates

(ii) By adjusting proportion of oil to water or using depressant.

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MCQ Questions for Class 12 Chemistry with Answers

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