CBSE Class 12 Chemistry Practicals 2022
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.
- In this article, we have compiled all of the information pertinent to Chemistry Practical Class 12 CBSE in order to assist students in achieving high marks in CBSE Class 12 Chemistry exams. Chemistry practical syllabus, practical projects, and practical exam question papers are all available to students. Continue reading this article to learn more about how to ace the Class 12 Chemistry exam.
CBSE Class 12 Chemistry Practical 2023: Marking Scheme
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 |
CBSE Class 12 Chemistry Practical Syllabus
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 Practical Class 12 Preparation Tips
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:
- The principle working behind the specific experiment can only be understood if you read the question carefully and thoroughly. If you understand the concept of each experiment performed in class, performing it is not a difficult task.
- Learn how to carry out the experiment: Make a plan for carrying out the experiment that has been assigned to you. Procedures vary depending on the experiment. So you should understand how an experiment is to be carried out and what equipment is required for that experiment.
- Don't cram the readings: Because different apparatus have different specifications, the set of readings obtained this time may differ from those obtained during class. It is preferable to review your fundamentals rather than cram.
- Understand diagrams and circuits: Visualize and draw rough diagrams for the experiments. During the exam, the examiner may come and reset all of your apparatus settings to see if they were not preset and may request that you reconstruct the entire setting
- Be confident during the practical examination: Stay calm during the experiment and document the entire procedure you follow so that you can answer oral questions asked by the examiner in the oral exam after the practical.
Chemistry Practical Project Class 12 CBSE
- Some of the projects for the CBSE Class 12 Chemistry Practicals are listed below:
- The presence of oxalate ions in guava fruit at various stages of ripening was investigated.
- The effect of potassium bisulphate as a food preservative under various conditions (temperature, concentration, time, and so on) was investigated.
- Essential oils extracted from Saunf (aniseed), Ajwain (carum), and Illaichi (cardamom).
- The investigation of common food adulterants in fat, oil, butter, sugar, turmeric powder, chili powder, and pepper.