Read and download the CBSE Class 12 Chemistry General Principles Process of Isolation of Elements Assignment Set A for the 2025-26 academic session. We have provided comprehensive Class 12 Chemistry school assignments that have important solved questions and answers for Unit 06 General Principles And Processes Of Isolation Of Elements. These resources have been carefuly prepared by expert teachers as per the latest NCERT, CBSE, and KVS syllabus guidelines.
Solved Assignment for Class 12 Chemistry Unit 06 General Principles And Processes Of Isolation Of Elements
Practicing these Class 12 Chemistry problems daily is must to improve your conceptual understanding and score better marks in school examinations. These printable assignments are a perfect assessment tool for Unit 06 General Principles And Processes Of Isolation Of Elements, covering both basic and advanced level questions to help you get more marks in exams.
Unit 06 General Principles And Processes Of Isolation Of Elements Class 12 Solved Questions and Answers
Question. An alkaline earth metal.
(A) Potassium
(B) Calcium
(C) Lead
(D) Copper
Answer: B
Question. Which of the following metallic oxides cannot be reduced by normal reducing agents ?
(A) Magnesium oxide
(B) Copper(II) oxide
(C) Zinc oxide
(D) Iron(III) oxide
Answer: A
Question. When a metal atom becomes an ion
(A) it loses electrons and is oxidized
(B) it gains electrons and is reduced
(C) it gains electrons and is oxidized
(D) it loses electrons and is reduced
(Choose the correct answer from the choices A, B, C and D)
Answer: A
Question. Brass is an alloy of :
(A) Copper and tin
(B) Copper and zinc
(C) Zinc and lead
(D) Lead and tin
Answer: B
Question. The metal oxide which can react with acid as well as alkali is :
(A) Silver oxide
(B) Copper (II) oxide
(C) Aluminium oxide
(D) Calcium oxide
Answer: C
Question. Select the correct answer from A, B, C and D – The property which is true for metals.
(A) Metals are good conductors of electricity
(B) Metals are malleable and ductile
(C) Non-polar covalent compounds are formed from metals.
(D) Metals have 1, 2 or 3 valence electrons.
Answer: C
Question. The amphoteric metallic oxide is
(A) Calcium oxide
(B) Barium oxide
(C) Zinc oxide
(D) Copper (II) oxide
Answer: C
Question. The metals zinc and tin are present in the alloy :
(A) Solder
(B) Brass
(C) Bronze
(D) Duralumin.
Answer: C
Question. Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as :
(A) smelting
(B) ore dressing
(C) calcination
(D) bessemerisation
Answer: C
Question. Aluminium powder is used in thermite welding because,
(A) it is a strong reducing agent
(B) it is a strong oxidising agent
(C) it is corrosion resistant
(D) it is a good conductor of heat.
Answer: A
Question. The main ore used for the extraction of iron is :
(A) Haematite
(B) Calamine
(C) Bauxite
(D) Cryolite
Answer: A
Question. Select which is not an alloy of copper :
(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
Answer: C
Question. Select the correct answer from A, B, C and D :kThe two main metals in Bronze are :
(A) Copper and zinc
(B) Copper and lead
(C) Copper and nickel
(D) Copper and tin
Answer: D
Question. The process does not involve a catalyst is :
(a) Haber process
(b) Contact process
(c) Thermite process
(d) Ostwald process
Question. Which one is malachite from the following?
(a) CuCO3.Cu(OH)2
(b) CuFeS2
(c) Cu(OH)2
(d) Fe3O4
Question. Identify the incorrect statement.
(a) The scientific and technological process used for isolation of the metal from its ore is known as metallurgy.
(b) Minerals are naturally occurring chemical substances in the earth’s crust.
(c) Ores are minerals that may contain a metal.
(d) Gangue is an ore contaminated with undesired materials.
Question. Chief ore of Al is :
(a) cryolite
(b) bauxite
(c) feldspar
(d) kaolin
Question. “Metals are usually not found as nitrates in their ores.” Out of the following two (I and II) reasons which is/are true for the above observation?
I. Metal nitrates are highly unstable.
II. Metal nitrates are highly soluble in water.
(a) I is false but II is true.
(b) I is true but II is false.
(c) I and II are true.
(d) I and II are false
Question. Which one of the following is a mineral of iron?
(a) Malachite
(b) Cassiterite
(c) Pyrolusite
(d) Magnetite
Question. Froth floatation is a process of:
(a) Oxidation
(b) Reduction
(c) Refining
(d) Concentration
Question. Cassiterite is an ore of
(a) Sb
(b) Ni
(c) Mn
(d) Sn
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Important Practice Resources for Class 12 Chemistry
CBSE Class 12 Chemistry Unit 06 General Principles And Processes Of Isolation Of Elements Assignment
Access the latest Unit 06 General Principles And Processes Of Isolation Of Elements assignments designed as per the current CBSE syllabus for Class 12. We have included all question types, including MCQs, short answer questions, and long-form problems relating to Unit 06 General Principles And Processes Of Isolation Of Elements. You can easily download these assignments in PDF format for free. Our expert teachers have carefully looked at previous year exam patterns and have made sure that these questions help you prepare properly for your upcoming school tests.
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How to solve Chemistry Unit 06 General Principles And Processes Of Isolation Of Elements Assignments effectively?
- Read the Chapter First: Start with the NCERT book for Class 12 Chemistry before attempting the assignment.
- Self-Assessment: Try solving the Unit 06 General Principles And Processes Of Isolation Of Elements questions by yourself and then check the solutions provided by us.
- Use Supporting Material: Refer to our Revision Notes and Class 12 worksheets if you get stuck on any topic.
- Track Mistakes: Maintain a notebook for tricky concepts and revise them using our online MCQ tests.
Best Practices for Class 12 Chemistry Preparation
For the best results, solve one assignment for Unit 06 General Principles And Processes Of Isolation Of Elements on daily basis. Using a timer while practicing will further improve your problem-solving skills and prepare you for the actual CBSE exam.
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All topics given in Unit 06 General Principles And Processes Of Isolation Of Elements Chemistry Class 12 Book for the current academic year have been covered in the given assignment
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Latest syllabus issued for current academic year by CBSE has been used to design assignments for Unit 06 General Principles And Processes Of Isolation Of Elements Class 12
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