# CBSE Class 12 Practical Exam 2021-22

CBSE Class 12 Practical Exam: The school officials will conduct the CBSE Class 12 Practical Exam 2021-22 and Project Assessments internally. Since the Central Board of Secondary Education (CBSE) Practical Exam is known as Internal Assessment, the student is expected to do well in the exam, which will help them improve their total CGPA. Read the article to have complete details on CBSE Class 12 Practical Exam.

## CBSE Class 12 Practical Exam 2022 for Physics

The Practicals For Class 12 CBSE Physics are provided here so that students can better understand the experiments. Before experimenting with color in Physics Class 12 Practical Exam, students should thoroughly understand the theory and law underlying it.

CBSE Class 12 Physics Experiments

 Experiments Assigned for Term I 1. To determine the resistivity of two / three wires by plotting a graph between potential difference versus current. 2. To find the resistance of a given wire / standard resistor using a meter bridge. OR To verify the laws of combination (series) of resistances using a meter bridge. OR To verify the Laws of combination (parallel) of resistances using a meter bridge. 3. To compare the EMF of two given primary cells using a potentiometer. OR To determine the internal resistance of a given primary cell using a potentiometer. 4. To determine the resistance of a galvanometer by half-deflection method and to find its figure of merit. 5. To convert the given galvanometer (of known resistance and figure of merit) into a voltmeter of desired range and to verify the same. OR To convert the given galvanometer (of known resistance and figure of merit) into an ammeter of desired range and to verify the same. 6. To find the frequency of AC mains with a sonometer. Experiments Assigned for Term-II 1. To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v. 2. To find the focal length of a concave lens, using a convex lens. OR To find the focal length of a concave lens, using a convex lens. 3. To determine the angle of minimum deviation for a given prism by plotting a graph between the angle of incidence and the angle of deviation. 4. To determine the refractive index of a glass slab using a traveling microscope. 5. To find the refractive index of a liquid by using a convex lens and plane mirror. 6. To draw the I-V characteristic curve for a p-n junction in forwarding bias and reverse bias.

### Class 12 Physics Activities

CBSE Class 12 Physics Activities Term I

1. To measure the resistance and impedance of an inductor with or without an iron core.
2. To measure resistance, voltage (AC/DC), current (AC), and check continuity of a given circuit using a multimeter.
3. To assemble a household circuit comprising three bulbs, three (on/off) switches, a fuse, and a power source.
4. To assemble the components of a given electrical circuit.
5. To study the variation in potential drop with the length of a wire for a steady current.
6. To draw the diagram of a given open circuit comprising at least a battery, resistor/rheostat, key, ammeter, and voltmeter. Mark the components that are not connected in proper order and correct the circuit and also the circuit diagram.

CBSE Class 12 Physics Activities Term II

1. To identify a diode, an LED, a resistor, and a capacitor from a mixed collection of such items.
2. Use of multimeter to see the unidirectional flow of current in case of a diode and an LED and check whether a given electronic component (e.g., diode) is in working order.
3. To study the effect of intensity of light (by varying distance of the source) on an LDR.
4. To observe refraction and lateral deviation of a beam of light incident obliquely on a glass slab.
5. To observe polarization of light using two Polaroids.
6. To observe the diffraction of light due to a thin slit.
7. To study the nature and size of the image formed by an (i) convex lens, (ii) concave mirror, on a screen by using a candle and a screen (for different distances of the candle from the lens/mirror).
8. To obtain a lens combination with the specified focal length by using two lenses from the given set of lenses.

## CBSE Class 12 Practical Exam 2022 for Chemistry

Before performing the experiments, students should study the laws and theories. Before the examination, students should revise their practical notes. The experiments for CBSE Class 12 Chemistry are provided here so that students can effectively prepare for their exams.

 Term I Class 12 Chemistry Practical Experiments (1) Volumetric analysis (4 marks) Determination of concentration/Molarity of KMnO4 solution by titrating it against a standard solution of: (i) Oxalic acid (ii) Ferrous Ammonium Sulphate (Students will be required to prepare standard solutions by weighing themselves) (2) Salt analysis (Qualitative analysis) (4 marks) Determination of one cation and one anion in a given salt. Cation:- Pb2+, Cu2+, As3+, Al3+, Fe3+, Mn2+ , Zn2+, Cu2+, Co2+, Ni2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4+ Anions:- (CO3)2‒, S2‒, (SO3)2‒, (SO4)2‒, (NO2)‒, (SO4)2‒, Cl‒, Br‒, I‒, PO43‒, (C2O4)2‒, CH3COO‒, NO3– (Note: Insoluble salts excluded) (3) Content-Based Experiments (2 marks) A. Chromatography (i) Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values (ii) Separation of constituents present in an inorganic mixture containing two cations only (constituents having a large difference in Rf values to be provided) B. Characteristic tests of carbohydrates, fats, and proteins in pure samples and their detection in given foodstuffs Term II Class 12 Chemistry Practical Experiments 1) Volumetric analysis (4 marks) Determination of concentration/Molarity of KMnO4 solution by titrating it against a standard solution of: (i) Oxalic acid (ii) Ferrous Ammonium Sulphate 2) Salt analysis (Qualitative analysis) (4 marks) Determination of one cation and one anion in a given salt. Cation:- Pb2+, Cu2+, As3+, Al3+, Fe3+, Mn2+ , Zn2+, Cu2+, Co2+, Ni2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4+ Anions:- (CO3)2‒, S2‒, (SO3)2‒, (SO4)2‒, (NO2)‒, (SO4)2‒, Cl‒, Br‒, I‒, PO43‒, (C2O4)2‒, CH3COO‒ 3) Content-based experiment A. Preparation of Inorganic Compounds (i) Preparation of double salt of Ferrous Ammonium Sulphate of Potash Alum. (ii) Preparation of Potassium Ferric Oxalate B. Tests for the functional groups present in organic compounds: Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic, and amino (Primary) groups

### Class 12 Chemistry Projects

A few suggested Projects are mentioned below:

• Study of the presence of oxalate ions in guava fruit at different stages of ripening.
• Study of quantity of casein present in different samples of milk.
• Preparation of soybean milk and its comparison with natural milk concerning curd formation, the effect of temperature, etc.
• Study of the effect of Potassium Bisulphate as food preservative under various conditions (temperature, concentration, time, etc.)
• Study of digestion of starch by salivary amylase and effect of pH and temperature on it.
• Comparative study of the rate of fermentation of the following materials: wheat flour, gram flour, potato juice, carrot juice, etc.
• Extraction of essential oils present in Saunf (aniseed), Ajwain (carum), Illaichi (cardamom).
• Study of common food adulterants in fat, oil, butter, sugar, turmeric powder, chili powder, and pepper.

## CBSE Class 12 Practical Exam 2022 for Biology

The Biology CBSE Class 12 Practical Exam experiments are provided here to assist students in better preparing for their practical exam in Class 12.

CBSE Class 12 Biology Practical Experiments

 A. List of Biology Experiments for Term I Isolate DNA from available plant material such as spinach, green pea seeds, papaya, etc. Prepare a temporary mount to observe pollen germination. List of Biology Experiments for Term II Prepare a temporary mount of the onion root tip to study mitosis. Collect and study soil from at least two different sites and study them for texture, moisture content, pH & water holding capacity. Correlate with the kinds of plants found in them. Collect water from two different water bodies around you and study them for pH, clarity, and presence of any living organism. B. Study/observation of the following (Spotting) for Term I Flowers adapted to pollination by different agencies (wind, insects, birds). Identification of stages of gamete development, i.e., T.S. of testis and T.S. of ovary through permanent slides (from grasshopper mice). Meiosis in onion bud cell or grasshopper testis through permanent slides. T.S. of blastula through permanent slides (Mammalian). Prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak, and colour blindness. Study/observation of the following (Spotting) for Term II Common disease-causing organisms Like Ascaris, Entamoeba, Plasmodium, Ringworm through permanent slides or specimens. Comment on symptoms of diseases that they cause. Two plants and two animals (models/virtual images) were found in xeric conditions. Comment upon their morphological adaptations. Two plants and two animals (models/virtual images) were found in aquatic conditions. Comment upon their morphological adaptations

## CBSE Class 12 Practical Exam 2022 for Computer Science

Python Programming

• Read a text file line by line and display each word separated by a #.
• Read a text file and display the number of vowels/ consonants/ uppercase/ lowercase characters in the file.
• Create a binary file with the name and roll number. Search for a given roll number and display the name, if not found display the appropriate message.
• Create a binary file with roll number, name, and marks. Input a roll number and update the marks.
• Remove all the lines that contain the character `a’ in a file and write it to another file.
• Write a random number generator that generates random numbers between 1 and 6 (simulates a dice).
• Write a Python program to implement a stack and queue using a list data structure.
• Take a sample of ten phishing e-mails (or any text file) and find the most commonly occurring word(s).

Database Management

• Create a student table and insert data. Implement the following SQL commands on the student table:
ALTER table to add new attributes / modify data type / drop
attribute
UPDATE table to modify data
ORDER By to display data in ascending / descending order
DELETE to remove tuple(s)
GROUP BY and find the min, max, sum, count, and average
• A similar exercise may be framed for other cases.
• Integrate SQL with Python by importing the MySQL module.

## CBSE Class 12 Lab Manual

The laboratory is important for completing the study, especially in subjects like Science and Mathematics. The practicals have been added in Class 12 by CBSE in order to familiarise students with the basic tools and procedures used in labs. They can effectively complete the experiments given in the CBSE Lab Manual with the help of this.

The competition is tough every year as many students from all over the country sit for the CBSE Class 12 Practical Exam. You can find the best materials, from the link given below.

## CBSE Class 12 Practical Exam Admit Card

The candidates will have to collect their Class 12 Practical Exam Admit Cards from their respective schools. The notification of the admit card arrival will be released on the CBSE website – cbse.nic.in.

## Instruction for CBSE Class 12 Practical Exam

• According to CBSE 12th latest updates, exams will be conducted from 10:30 a.m. to 1:30 p.m.
• For Class 12 Practical Exam, the candidates will be distributed in convenient batches according to the number of examinees and capacity of the laboratory.

### Other Important Links Related To CBSE Class 12

We have covered a detailed guide on CBSE Class 12 Practical Exam 2021-22. Feel free to ask any questions regarding CBSE Class 12 in the comment section below.

## FAQs: CBSE Class 12 Practical Exam

### Are practicals cancelled for Class 12 CBSE?

No. The practicals are not cancelled for Class 12 CBSE Board Exam 2022.

### Do we get full marks in practicals Class 12?

Practicals, unlike CBSE written exams, are conducted in the school under the supervision of an external examiner. Students frequently anticipate receiving over 80% in the Class 12 Practical Exam, which is worth 25-30 marks out of 100.

### Does everyone get good marks in the Class 12 Practical Exam?

You will definitely get good marks in Class 12 Practical Exam if you prepare well.

### What are the CBSE Class 12 Practical Dates in 2022?

The dates for CBSE Class 12 Practical Exam, as well as the date sheet, will be announced soon.