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Practical Exam Tips for CBSE 2023 Class 10 Board Exams For Science Students

Horizon Academy Neet coaching in Yamuna Vihar east Delhi brought Practical Exam Tips for CBSE 2023 Class 10. Practicals play an important role in boosting students’  Marks and knowledge. Lab work is an essential component in order to make students’ learning complete, especially in Science. CBSE has included the Class 10 Science practicals in secondary classes intending to make students acquainted with the basic tools and techniques used in the laboratory. 

By performing the experiments, students will understand the concept in a better way and their basics will become stronger. Students also develop a keen interest in Science along with questioning skills and scientific temperament. 

With the help of the following tips, students can successfully perform the experiments listed in the class 10 Science practicals.

Science practicals also carry marks. The CBSE class 10 Science theory paper is of 80 marks and 20 marks are allocated to internal assessment. The marking scheme for internal assessment is as follows:

Internal Assessment Class 10 Science Marking Scheme

 Periodic Assessment  05 marks + 05 marks
 Practical Work  05 marks
 Portfolio  05 marks
 Total  20 marks

List of Experiments for CBSE class 10 Science Practicals 2022-23

In class 10 Science, a total of 14 practicals are included in the syllabus as given below:

Q. No. Practical Subject
        1 A. Finding the pH of the following samples by using pH paper/universal indicator:
(i) Dilute Hydrochloric Acid
(ii) Dilute NaOH solution
(iii) Dilute Ethanoic Acid solution
(iv) Lemon juice
(v) Water
(vi) Dilute Hydrogen Carbonate solution
B. Studying the properties of acids and bases (HCl & NaOH) on the basis of their reaction with:
a) Litmus solution (Blue/Red)
b) Zinc metal
c) Solid sodium carbonate
       2 Performing and observing the following reactions and classify them into:
A. Combination reaction
B. Decomposition reaction
C. Displacement reaction
D. Double displacement reaction
(i) Action of water on quicklime
(ii) Action of heat on ferrous sulphate crystals
(iii) Iron nails kept in copper sulphate solution
(iv) Reaction between sodium sulphate and barium chloride solutions
       3 Observing the action of Zn, Fe, Cu, and Al metals on the following salt solutions:
i) ZnSO4(aq)
ii) FeSO4(aq)
iii) CuSO4(aq)
iv) Al2 (SO4)3(aq)
Arranging Zn, Fe, Cu, and Al (metals) in decreasing order of reactivity based on the above result.
       4 Studying the dependence of potential difference (V) across a resistor on the current (I) passing through it and determining its resistance. Also plotting a graph between V and I. Physics
       5 Determination of the equivalent resistance of two resistors when connected in series and parallel. Physics
       6 Preparing a temporary mount of a leaf peel to show stomata. Biology
       7 Experimentally show that carbon dioxide is given out during respiration. Biology
       8 Study of the following properties of acetic acid (ethanoic acid):
i) Odour
ii) Solubility in water
iii) Effect on litmus
iv) Reaction with Sodium Hydrogen Carbonate
       9 Study of the comparative cleaning capacity of a sample of soap in soft and hard water. Chemistry
      10 Determination of the focal length of:
i) Concave mirror
ii) Convex lens
by obtaining the image of a distant object
      11 Tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. Measure the angle of incidence, angle of refraction, and angle of emergence and interpret the result. Physics
      12 Studying (a) binary fission in Amoeba, and (b) budding in yeast and Hydra with the help of prepared slides. Biology
      13 Tracing the path of the rays of light through a glass prism. Physics
      14 Identification of the different parts of an embryo of a dicot seed (Pea, gram, or red kidney bean). Biology

Science Practical Important Questions for Class 10


Questions are generally asked from the basic theory portion related to practicals. So focus on the related terminology, chemical formula/composition, properties, etc.

For example, if you are studying Practical like the action of different metals on various salt solutions, then you should know the definition of displacement reaction, activity series, and its characteristics.


General application and significance-based questions are asked from the practicals such as the preparation of temporary mounts, and the study of various asexual modes of reproduction. For practicals related to the topic of Photosynthesis, a depth study of the procedure and key roles of certain chemicals added should be remembered.


Generally, application-based questions are asked. So focus on concepts and their applications. It is also important to remember the definitions.

Students should remember the ray diagrams, circuit diagrams as well as formulae which are generally used in practicals.

Students should have adequate knowledge of apparatus and instruments.

Key tips to remember:

  • Read experiments carefully and understand the underlying concept.
  • For writing answers, learn the stepwise procedures and write them in the passive voice.
  • Don’t cram readings/observations. Conduct your experiment with a calm mind and write the readings/observations obtained.
  • Be thorough with the diagrams and draw neat and well-labeled diagrams wherever required.
  • Be confident and calm while performing experiments.
  • While performing Chemistry experiments, handle the equipment and chemicals carefully as some of these chemicals are strongly reactive.
  • Observe the readings carefully and don’t forget to use standard conventions and SI units while writing answers.


Backed with practice and a regular learning schedule, these tips will surely help you to perform outstandingly in your practical exams.


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