what is the importance of practicals in class 10 board exam ??
Answers
Answer:
CBSE Class 10 Science theory and practical examinations will be conducted tomorrow - 04th March 2020. At this time, when most of the students would be busy with the last-minute preparations of their Science theory exam, hardly they would get sufficient time to prepare for the practical exam. However, students should remember that practical assessment forms an essential part of the CBSE Class 10 Science Board Exams. Do not forget the fact that the marks obtained in the practical examination will be added to your scores obtained in the theory paper to calculate the final results.
Considering the importance of practical exam, Jagran Josh brings here the latest syllabus of Class 10 Science Practical along with some important preparation tips to perform well in the CBSE Class 10 Science Practical Exam 2020.
CBSE Class 10 Science Practical Syllabus for Board Exam 2020:
List of Experiments
Experiment 1.
A. Finding the pH of the following samples by using pH paper / universal indicator:
a) Dilute Hydrochloric Acid
b) Dilute NaOH solution
c) Dilute Ethanoic Acid Solution
d) Lemon juice
e) Water
f) 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
Also Read: CBSE Class 10 Science Important Resources & Tips for Last Minute Preparation of Board Exam 2020
Experiment 2. Performing and observing the following reactions and classifying them into :
a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Double displacement reaction
(i) Action of water on quick lime
(ii) Action of heat on ferrous sulphate crystals 70
(iii) Iron nails kept in copper sulphate solution
(iv) Reaction between sodium sulphate and barium chloride solutions
Experiment 3. Observing the action of Zn, Fe, Cu and Al metals on the following salt solutions :
a) ZnSO4 (aq)
b) FeSO4 (aq)
c) CuSO4 (aq)
d) Al2(SO4)3 (aq)
Arranging Zn, Fe, Cu and Al (metals) in the decreasing order of reactivity based on the above result.
CBSE Class 10 Science Preparation Tips for Physics, Chemistry & Biology
Experiment 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.
Experiment 5. Determination of the equivalent resistance of two resistors when connected in series and parallel.
Experiment 6. Preparing a temporary mount of a leaf peel to show stomata.
Experiment 7. Experimentally show that carbon dioxide is given out during respiration.
Experiment 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
Experiment 9. Study of the comparative cleaning capacity of a sample of soap in soft and hard water.
Experiment 10. Determination of the focal length of :
i) Concave mirror
ii) Convex lens
by obtaining the image of a distant object.
Experiment 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.
Experiment 12. Studying (a) binary fission in Amoeba, and (b) budding in yeast with the help of prepared slides.
Experiment 13. Tracing the path of the rays of light through a glass prism.
Experiment 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.
Experiment 15. Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean).
Prescribed Book for CBSE Class 10 Science Practical Assessment:
● Laboratory Manual - Science - Class X, NCERT Publication
Preparation Tips for Class 10 Science Practical Exam 2020
Read each experiment carefully to understand the principle working behind it. This will help you to identify the category of that experiment for which you know a particular procedure to be followed.
For example, if you are asked to trace the path of a ray of light passing through a rectangular glass slab, then you should know the law working behind reflection, refraction and emergence of light to obtain the correct path of ray of light.
Learn the step-wise procedure to conduct each experiment properly.
Never try to cram the readings because different apparatus have different specifications which may cause an alteration in the readings obtained for an experiment at different times.
Learn the circuits and diagrams properly, especially for physics and biology experiments.
For chemistry practical, you must be good at distinguishing between various compounds and salts by their colour, odour or texture.
For example, you should be able to sense the rotten egg kind of smell of hydrogen gas which is colourless to observe.
Answer:
it is important because in 10 exam all questions are main.