Question

nios1 0th science and technology pratical record notes please send me ​

Answer 1

Explanation:

The practical should be conducted alongside the concept taught in the theory classes. In class 10 Science, students have a total of 15 practicals in the syllabus. The list of these practicals is provided below.

List of Experiments for CBSE class 10 Science Practicals

1. A. Finding the pH of the following samples by using pH paper/universal indicator: (not included for this academic year) 

(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 determine its resistance. Also plotting a graph between V and I.

5. Determination of the equivalent resistance of two resistors when connected in series and parallel.

6. Preparing a temporary mount of a leaf peel to show stomata.

7. Experimentally show that carbon dioxide is given out during respiration.

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.

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, angle of emergence and interpret the result.

12. Studying (a) binary fission in Amoeba, and (b) budding in yeast and Hydra with the help of prepared slides.

13. Tracing the path of the rays of light through a glass prism.

14. Finding the image distance for varying object distances in case of a convex lens and drawing corresponding ray diagrams to show the nature of image formed. (not included for this academic year)

15. Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean). (not included for this academic year)

CBSE Class 10 Science Lab Manual

For carrying out experiments in the laboratory, students need to know the proper use of the instruments. This CBSE Class 10 Science lab manual familiarises students with the available instruments in the laboratory and informs them about the do’s and don’t while performing experiments. Teachers also explain to students about all these things at the beginning of the session.

Each experiment in the CBSE class 10 Science lab manual is described in the following points:

Aim: It explains the objective of the experiment.Theory: It explains the basic principles, laws or theories on which the experiment is based.Material required: Under this head, all the equipment, measuring devices and other material that is necessary to conduct the experiment are enlisted.Procedure: Under this heading, steps to perform the experiment are mentioned in a proper sequence. Also, diagrams are drawn wherever required to present the pictorial view of the experiment.Observation: All the observations are noted down while performing the experiments. For a better presentation, observations are noted in the form of a table. Proper units are expressed for each measurement.Calculations: Calculation is done based on the observation by using the formulae. In some experiments, graphs are also drawn.Results and Discussion: The final result of the experiment is mentioned under this heading.Precautions and Sources of Errors: All the precautions that are observed while conducting the experiments are mentioned here. Also, the sources of error which arise due to the limitation of equipment are stated under this heading.