MCQ Questions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements Part-1 with Answers

General Principles and Processes of Isolation of Elements Part-1 Class 12 Chemistry MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements Part-1 with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have Provided General Principles and Processes of Isolation of Elements Part-1 Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Class 12 Chemistry Chapter 6 Quiz

Class 12 Chemistry Chapter 6 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements Part-1 to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

General Principles and Processes of Isolation of Elements Part-1 Class 12 Chemistry MCQ online test

Q1.	Concentration of sulphide ore is done by
	A.froth flotation process
	B.electrolysis
	C.roasting
	D.None of these

Ans: froth flotation process

Q2.	Malachite is an ore of
	A.iron
	B.copper
	C.zinc
	D.Sliver

Ans: copper

Q3.	Formula of copper pyrite is
	A.Cu₂S
	B.CuFeS
	C.CuFeS₂
	D.Cu₂Fe₂S₂

Ans: CuFeS₂

Q4.	Ore of aluminium is
	A.bauxite
	B.hematite
	C.dolomite
	D.None of these

Ans: bauxite

Q5.	Removal of the unwanted materials like sand, clays, etc. from the ore is known as ………., …….. or ……….
	A.concentration, dressing, benefaction
	B.separation, refining, gangue
	C.magnetic separation, purification, gangue
	D.washing, refining, amalgamation

Ans: concentration, dressing, benefaction

Q6.	For which of the following ores froth floatation method is used for concentration?
	A.Haematite
	B.Zinc blende
	C.Magnetite
	D.Camallite

Ans: Zinc blende

Q7.	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

Ans: gravity separation

Q8.	The oil used as frothing agent in froth floatation process is
	A.coconut oil
	B.castor oil
	C.palmitic oil
	D.pine oil

Ans: pine oil

Q9.	Which of the following metals is not extracted by leaching?
	A.Aluminium
	B.Mercury
	C.Silver
	D.Gold

Ans: Mercury

Q10.	Sulphide ore of zinc/copper is concentrated by
	A.floatation process
	B.electromagnetic process
	C.gravity separation
	D.distillation

Ans: floatation process

Q11.	Which of the following ores is concentrated by chemical leaching method?
	A.Cinnabar
	B.Argentite
	C.Copper pyrites
	D.Galena

Ans: Argentite

Q12.	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

Ans: By adjusting proportion of oil to water or using depressant.

Q13.	Common impurities present in bauxite are
	A.CuO
	B.ZnO
	C.CaO
	D.SiO₂

Ans: SiO₂

Q14.	An ore of tin containing FeCrO₄ is concentrated by
	A.gravity separation
	B.magnetic separation
	C.froth floatation
	D.leaching

Ans: magnetic separation

Q15.	Which of the following ores cannot be concentrated by magnetic separation?
	A.Haematite
	B.Malachite
	C.Magnetite
	D.Siderite

Ans: Malachite

Q16.	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

Ans: it helps removing the impurities like SiO₂, Fe₂O₃ etc. from the bauxite ore

Q17.	Which of the following metals is extracted using a silica lined convertor?
	A.Mg
	B.Al
	C.Cu
	D.Zn

Ans: Cu

Q18.	Which of the following sulphides when heated strongly in air gives the corresponding metal without undergoing separate reduction of oxide?
	A.Cu₂S
	B.FeS
	C.HgS
	D.ZnS