Here, you will get Class 12 Chemistry MCQ of Chapter 6 General Principles And Processes Of Isolation Of Elements for cracking JEE and NEET/AIIMS. By solving these MCQs of Class 12 Chemistry Chapter 6 General Principles And Processes Of Isolation Of Elements, you will get the confidence to crack JEE or NEET. Practice MCQ Questions for Class 12 Chemistry with Answers on a daily basis and score well in exams.
General Principles And Processes Of Isolation Of Elements 12 MCQs Questions with Answers
Malachite is an ore of
(a) iron
(b) copper
(c) zinc
(d) Sliver
Answer: (b) copper
For which of the following ores froth floatation method is used for concentration?
(a) Haematite
(b) Zinc blende
(c) Magnetite
(d) Camallite
Answer: (b) Zinc blende
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
Answer: (d) gravity separation
Which of the following metals is not extracted by leaching?
(a) Aluminium
(b) Mercury
(c) Silver
(d) Gold
Answer: (b) Mercury
How do we separate two sulphide ores by froth floatation method?
(a) By using excess of pine oil
(b) By adjusting proportion of oil to water or using depressant
(c) By using some solvent in which one of the sulphides is soluble
(d) By using collectors and froth stabilisers like xanthates
Answer: (b) By adjusting proportion of oil to water or using depressant
The salt which is least likely to be found in minerals is
(a) Chloride
(b) Sulphate
(c) Sulphide
(d) Nitrate
Answer: (d) Nitrate
Pyrolusite is a/an
(a) Oxide ore
(b) Sulphide ore
(c) Carbide ore
(d) not an ore
Answer: (a) Oxide ore
In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2O with
(a) FeS
(b) CO
(c) Cu2S
(d) SO2
Answer: (c) Cu2S
Which of the following metals is most abundant in the earth’s crust?
(a) Mg
(b) Na
(c) Al
(d) Fe
Answer: (c) Al
Which of the following benefication process is used for the mineral Al2O3.2H2O?
(a) Froth Floatation
(b) Leaching
(c) Liquation
(d) Magnetic separation
Answer: (b) Leaching
Ore of aluminium is
(a) bauxite
(b) hematite
(c) dolomite
(d) None of these
Answer: (a) bauxite
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
Answer: (d) gravity separation
Which of the following ores is concentrated by chemical leaching method?
(a) Cinnabar
(b) Argentite
(c) Copper pyrites
(d) Galena
Answer: (b) Argentite
Which of the following ores cannot be concentrated by magnetic separation?
(a) Haematite
(b) Malachite
(c) Magnetite
(d) Siderite
Answer: (b) Malachite
The significance of leaching in the extraction of aluminium is
(a) it helps removing the impurities like SiO2, Fe2O3 etc. from the bauxite ore
(b) it converts the ore into oxide
(c) it reduces melting point of the ore
(d) it eliminates water from bauxite
Answer: (a) it helps removing the impurities like SiO2, Fe2O3 etc. from the bauxite ore
Which of the following metals cannot be obtained by reduction of its metal oxide bv aluminium ?
(a) Cr
(b) Mn
(c) Fe
(d) Mg
Answer: (d) Mg
In metallurgical process, aluminium acts as
(a) an oxidising agent
(b) a reducing agent
(c) acidic flux
(d) basic flux
Answer: (b) a reducing agent
During smelting an additional substance is added which combines with impurities to form a fusible mass. The additional substance is called
(a) Flux
(b) Slag
(c) Gangue
(d) Ore
Answer: (a) Flux
The process of isolation of metals by dissolving the ore in a suitable chemical eagent following by precipitation of the metal by a more electropositive metal is called
(a) Electrometallurgy
(b) Hydrometallurgy
(c) Electro-refusing
(d) Zone-refining
Answer: (b) Hydrometallurgy
The process of concentrating Au and Ag ores is based upon their solubility in
(a) NH3
(b) HNO3
(c) HCl
(d) KCN
Answer: (d) KCN
Heating pyrites to remove sulphur is called
(a) smelting
(b) calcination
(c) liquation
(d) roasting
Answer: (d) roasting
From the Ellingham graph between Gibb’s energy and temperature, out of C and CO with is a better reducing agent for ZnO?
(a) Carbon
(b) CO
(c) Both of these
(d) None of these
Answer: (a) Carbon
Bessemer converter is used in the manufacture of
(a) Pig iron
(b) Steel
(c) Wrought iron
(d) Cast iron
Answer: (b) Steel
Which of the following oxides cannot be reduced by hydrogen?
(a) Ferric oxide
(b) Aluminium oxide
(c) Zinc oxide
(d) Cupric oxide
Answer: (b) Aluminium oxide
Blister copper is
(a) impure copper
(b) obtained in self reduction process during bessermerisation
(c) Both are correct
(d) None is correct
Answer: (c) Both are correct
Hope these MCQs help you in your preparation for JEE or NEET/AIIMS. You can download a PDF of Class 12 Chemistry Chapter 6 General Principles And Processes Of Isolation Of Elements this MCQ by Clicking on ctrl + p. If you have any other queries of CBSE Class 12 Chemistry General Principles And Processes Of Isolation Of Elements MCQs Multiple Choice Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible.