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Updated on 09th February, 2023 , 4 min read
CBSE Class 12 Chemistry Practicals are based on Chemistry Concepts such as surface chemistry, thermochemistry, chemical kinetics, chromatography, functional groups in organic compounds, electrochemistry, cations, quantitative analysis, anions, and so on.
It is critical for students to focus on achieving high marks in all activities associated with Chemistry lab practicals. This improves students' overall performance in the Class 12 board exams. In the table below, we have provided the evaluation scheme for the practical examination.
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CBSE Class 12 Chemistry Practical Examination Marking Scheme |
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Volumetric Analysis |
4 |
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Salt Analysis |
4 |
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Content-Based Experiment |
2 |
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Project Work and Viva |
5 |
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Total Marks |
15 |
The detailed syllabus for CBSE Class 12 Chemistry practicals is provided below. For a variety of practical experiments, micro-chemical methods are available. These strategies ought to be applied whenever possible.
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A. Surface Chemistry |
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(a) Preparation of one lyophilic and one lyophobic sol Lyophilic sol – starch, egg albumin and gum Lyophobic sol – aluminium hydroxide, ferric hydroxide, arsenous sulphide.
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(b) Dialysis of the above-mentioned sol. |
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(c) Study of the role of emulsifying agents in stabilizing the emulsion of different oils |
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B. Chemical Kinetics (a) Effect of concentration and temperature on the rate of reaction between Sodium Thiosulphate and Hydrochloric acid |
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(b) Investigate the reaction rates of any of the following:
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C. Thermochemistry |
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Any one of the following experiments
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D. Electrochemistry |
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E. Chromatography |
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F. Preparation of Inorganic Compounds |
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Making a double salt of ferrous ammonium sulphate or potassium alum. Potassium Ferric Oxalate Preparation. |
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G. Preparation of Organic Compounds |
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Preparation of any one of the following compounds
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H. Tests for the presence of functional groups in organic compounds: Alcoholic, phenolic, aldehydic, ketonic, carboxylic, and amino (Primary) groups. |
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I. Carbohydrate, fat, and protein characterization tests in pure samples and their detection in given foodstuffs. |
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J. Determination of KMnO4 solution concentration/molarity by titration against a standard solution of: |
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(a) Oxalic acid |
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(b) Ferrous Ammonium Sulphate (Students will be required to weigh themselves to prepare standard solutions) |
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K. Qualitative analysis Determination of one anion and one cation in a given salt |
Cation:
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Anions:
(Note: Insoluble salts excluded). |
Chemistry Class 12 Practicals are extremely important for scoring well in the final Board Exams because they are worth 30 points. Some helpful hints for preparing for the practicals are as follows:
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CBSE 12th Result 2023 (Declared):Check Result Online, Weightage of Marks, Calculate Percentage
By - Nikita Parmar 2023-05-12 06:13:05 , 2 min readThe question paper distributed to students should be typed legibly. It should include 15 practical skill-based very short answer questions.
Yes, it is relatively simple to obtain good/full marks in class 12th practicals. All you have to do is conduct experiments and provide appropriate answers in the viva.
The CBSE board practical class 12 exam lasts three hours.
First and foremost, comprehend the Practical Exam questions. Then go through each salt analysis experiment one by one. Learn by heart the specific experiments and observations, as well as the groups involved. Learn properly and sequentially experiments.
External examiners appointed by the board will conduct class 12th practical exams, while internal examiners will be used for class 10th.
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