Find here the NCERT Book Multiple Choice Questions from Class 12 Chemistry book with Answers Pdf free download as per CBSE new exam pattern. 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 Class 12 Chemistry. 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.
Q.1 Cinnabar is an ore of
(a) Hg
(b) Ag
(c) Sn
(d) Al
(a) Hg
Q.2 Pyrolusite is an ore of
(a) Ag
(b) Hg
(c) Sn
(d) Mn
(d) Mn
Q.3 Malachite is an ore of
(a) Hg
(b) Cu
(c) Sn
(d) Mn
(b) Cu
Q.4 The process employed for the concentration of sulphide ore is
(a) Froth floatation
(b) Roasting
(c) Electrolysis
(d) Calcination
(a) Froth floatation
Q.5 Zone-refining is used for the
(a) concentration of an ore
(b) reduction of metal oxide
(c) purification of metal
(d) purification of an ore.
(c) purification of metal
Q.6 The metal always found in free state is
(a) Gold
(b) Silver
(c) Copper
(d) Sodium
(a) Gold
Q.7 Bauxite is an ore of
(a) Aluminium
(b) Calcium
(c) Copper
(d) Zinc
(a) Aluminium
Q.8 Most abundant element in earth’s crust is
(a) O
(b) Si
(c) Al
(d) Fe
(a) O
Q.9 Concentration of sulphide ore is done by
(a) froth flotation process
(b) electrolysis
(c) roasting
(d) None of these
(a) froth flotation process
Q.10 Malachite is an ore of
(a) iron
(b) copper
(c) zinc
(d) Sliver
(b) copper
Q.11 Ore of aluminium is
(a) bauxite
(b) hematite
(c) dolomite
(d) None of these
(a) bauxite
Q.12 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
(a) concentration, dressing, benefaction
Q.13 For which of the following ores froth floatation method is used for concentration?
(a) Haematite
(b) Zinc blende
(c) Magnetite
(d) Camallite
(b) Zinc blende
Q.14 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
(d) gravity separation
Q.15 The oil used as frothing agent in froth floatation process is
(a) coconut oil
(b) castor oil
(c) palmitic oil
(d) pine oil
(d) pine oil
Q.16 Which of the following metals is not extracted by leaching?
(a) Aluminium
(b) Mercury
(c) Silver
(d) Gold
(b) Mercury
Q.17 Sulphide ore of zinc/copper is concentrated by
(a) floatation process
(b) electromagnetic process
(c) gravity separation
(d) distillation
(a) floatation process
Q.18 The electrolytic reduction technique is used in the extraction of
(a) Highly electronegative elements.
(b) Highly electropostive elements.
(c) Metalloids.
(d) Transition metals.
(b) Highly electropostive elements.
Q.19 Which ore can be best concentrated by froth floatation process?
(a) Malachite
(b) Cassiterite
(c) Galena
(d) Magnetite
(c) Galena
Q.20 Electrolytic reduction of Al2O3 to Al by Hall- Herault process is carried out
(a) in presence of NaCl.
(b) in presence of fluorite.
(c) in presence of cryolite which forms a melt with lower melting point.
(d) in presence of cryolite which forms a melt with high melting point.
(c) in presence of cryolite which forms a melt with lower melting point.
Q.21 Bessemer converter is used in the manufacture of
(a) Pig iron
(b) Steel
(c) Wrought iron
(d) Cast iron
(b) Steel
Chemistry MCQ Questions for Class 12 with Answers
- Chapter 1: The Solid State Class 12 MCQ Questions
- Chapter 2: Solutions Class 12 MCQ Questions
- Chapter 3: Electrochemistry Class 12 MCQ Questions
- Chapter 4: Chemical Kinetics Class 12 MCQ Questions
- Chapter 5: Surface Chemistry Class 12 MCQ Questions
- Chapter 6: General Principles and Processes of Isolation of Elements Class 12 MCQ Questions
- Chapter 7: The p-Block Elements Class 12 MCQ Questions
- Chapter 8: The d-and f-Block Elements Class 12 MCQ Questions
- Chapter 9: Coordination Compounds Class 12 MCQ Questions
- Chapter 10: Haloalkanes and Haloarenes Class 12 MCQ Questions
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