CBSE Class 12 Chemistry Boards 2020 Sample Paper Solved

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Official CBSE Practice Papers for Class 12 Chemistry

Explore authentic exam practice materials through the CBSE Class 12 Chemistry Boards 2020 Sample Paper Solved. Tailored for Class 12 learners, utilizing these Chemistry sample papers ensures thorough preparation and strengthens time management skills before final CBSE evaluations.

Solved Model Papers for Chemistry

Access the complete sample paper PDF for Class 12 Chemistry below. Regular practice with these targeted mock exams builds familiarity with expected question patterns and chapter weightage to help secure higher marks.

CBSE Class 12 Chemistry Boards 2020 Sample Paper Solved. CBSE has recently released the class 12 sample papers for subject Chemistry. These suggested sample papers are released every year by CBSE ahead of the class 12 board exams so that the students can understand the pattern of question paper and type of questions which is expected to come in the Class 12 board exams. Students can refer to the attached question paper along with marking scheme to understand what they can expect in the board exams in 2020. Its always better to solve the question paper first and then refer to provided answers. 

SECTION - A

Read the given passage and answer the questions 1 to 5that follow:
 
A Lead storage battery is the most important type of secondary cell having a lead anode and a grid of lead packed with PbO2 as cathode. A 38% solution of sulphuric acid is used as electrolyte. (Density=1.294 g mL-1) The battery holds 3.5 L of the acid. During the discharge of the battery, the density of H2SO4 falls to 1.139 g mL-1. (20% H2SO4 by mass)
 
(1) Write the reaction taking place at the cathode when the battery is in use.
 
(2) How much electricity in terms of Faraday is required to carry out the reduction of one mole of PbO2?
 
(3) What is the molarity of sulphuric acid before discharge?
 
(4) Lead storage battery is considered a secondary cell. Why?
 
(5) Write the products of electrolysis when dilute sulphuric acid is electrolysed using Platinum electrodes.
 
Questions 6 to 10 are one word answers:
 
(6) Name the substance used as depressant in the separation of two sulphide ores in Froth floatation method.
 
(7) Name the unit formed by the attachment of a base to 1' position of sugar in a nucleoside.
 
(8) Name the species formed when an aqueous solution of amino acid is dissolved in water?
 
(9) What type of reaction occurs in the formation of Nylon 6,6 polymer?
 
(10) Which of the following compoundswould undergo cannizzaro reaction: Benzaldehyde, Cyclohexanone, 2- Methylpentanal.
 
Questions 11 to 15 are multiple choice questions:
 
(11) The IUPAC name of the compound shown below is:

 CBSE-Class-12-Chemistry-Boards-2020-Sample-Paper-Solved 1

(a) 2-bromo-6-chlorocyclohex-1-ene
 
(b) 6-bromo-2-chlorocyclohexene
 
(c) 3-bromo-1-chlorocyclohexene
 
(d) 1-bromo-3-chlorocyclohexene
 
(12) When one mole of CoCl3.5NH3 was treated with excess of silver nitrate solution, 2 mol of AgCl was precipitated. The formula of the compound is:
 
(a) [Co(NH3)5Cl2]Cl
 
(b) [Co(NH3)5Cl]Cl2
 
(c) [Co(NH3)4Cl2] (NH3)Cl
 
(d) [Co(NH3)3Cl3] (NH3)2



Please refer to link below to download CBSE Class 12 Chemistry Boards 2020 Sample Paper Solved

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Download CBSE Sample Papers: Class 12 Chemistry

Download Sample Paper: CBSE Class 12 Chemistry Boards 2020 Sample Paper Solved (Class 12 Chemistry)

Review model practice papers for Class 12 Chemistry. Working through the CBSE Class 12 Chemistry Boards 2020 Sample Paper Solved under simulated test conditions at home ensures complete familiarity with upcoming school evaluations.

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  • Original Practice Material: Access unique questions for Chemistry designed to challenge your understanding.
  • Self-Assessment: Evaluate scores per set to pinpoint weak zones in Class 12 Chemistry.
  • Exam Completion Skills: Routine problem sets train you to manage test duration efficiently without stress.

Steps to Follow After Completing CBSE Class 12 Chemistry Boards 2020 Sample Paper Solved

  1. Review Solutions: Evaluate your completed papers using expert-verified guidance inside our solution sets.
  2. Target Weaknesses: Class 12 students should analyze missed questions to rectify conceptual misunderstandings.
  3. Deep Revision: Re-read sections in the NCERT book for Class 12 Chemistry to clear doubts before solving items again.

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Practicing this Chemistry paper helps in time management and identifying important topics. For Class 12, solving mock papers is the best way to gain confidence and reduce exam-day anxiety.

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