CBSE Class 10th Science Important Practical Based Questions

CBSE Class 10th Science Important Practical Based Questions

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CBSE Class 10th Science Important Practical Based Questions

Below article focuses on various important practical based questions for class 10th science CBSE board students for the final preparation of board examination, the questions are more preferable for the advanced preparation for the exam.

All the below questions updated by our experienced faculty and an experience team for providing you the best preparation for your final board examination, the below articles contains all the practical based important questions which are mostly and have maximum chances for asking in examination.

Here, the below article for the most important practical based questions for class 10th science:


CBSE Class 10th Science important practical based questions


Question.  An incomplete ray diagram is shown below where the image A’B’ for an object AB (placed somewhere in front of lens) is formed after refraction through the convex lens.


Observe the above and use the given information to fill in the following blanks :

(i) The object AB would have been placed _________ .

(ii) Size of the object would have been _________ than the size of image.


Question. Write the methods of reproduction in hydra plant?


Question. A student focuses the image of a candle flame, placed at about 2 m from a convex lens of focal length 10 cm, on a screen. After that he moves gradually the flame towards the lens and each time focuses its image on the screen.

(a) In which direction does he move the lens to focus the flame on the screen?

(b) What happens to the size of the image of the flame formed on the screen?

(c) What difference is seen in the intensity (brightness) of the image of the flame on the screen?

(d) What is seen on the screen when the flame is very close (at about 5 cm) to the lens?


  Question. A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations that he/she must note in his/her notebook about the reaction that takes place. Also, write chemical equation for the reaction.


Question. Baking soda solution when reacted with ethanoic acid gives a brisk effervescence. What is the reason behind this observation? Write the chemical equation for the reaction involved here.


Question. A student is observing a permanent slide showing, sequentially, the different stages of asexual reproduction taking place in yeast. Name this process and draw diagrams of what he observes in a proper sequence.


Question. Mention the essential material (chemicals) to prepare soap in the laboratory. Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of saponification reaction.


Question. An object of height 2.5 cm is placed at a distance of 15 cm from the optical centre ‘O’ of a convex lens of focal length 10 cm. Draw a ray diagram to find the position and size of the image formed. Mark the optical centre ‘O’, principal focus F and height of the image on the diagram.


Question. What happens when ethanol is heated with acidified potassium dichromate solution? Write the chemical equation.


Question. Write two precautions to be taken while identifying different parts of an embryo of a dicot seed.


Question. When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with brisk effervescence. Name this gas. Describe the method of testing this gas.


Question. A student is to conduct an experiment to show CO2 is released during  respiration. List two precautions that he/she must take for obtaining correct observation.

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