CBSE Class 10th Science Important Questions

CBSE Class 10th Science Important Questions

CBSE Class 10th

CBSE Class 10th Science Important Questions

CBSE Class 10th Science Important Questions: Below article focuses on various important questions for class 10th Science CBSE students for the final preparation of examination. Questions are more preferable for the advanced preparation for the exam.

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

 

So go through the below article for the most important questions for class 10th Science.

CBSE Class 10th Science Important Questions

Q. The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State, giving reason, which two elements will show similar properties.
Q. What is the effect of DNA copying, which is not perfectly accurate, on the reproduction process?
Q. Give reasons for the following:
(a) Arteries are thick walled.
(b) Blood goes only once in one cycle through the heart in fishes.
(c) Plants have low energy needs.
Q. The resistance of a wire of 0.01 cm radius is 10Ω. If the resistivity of the material of the wire is 50 × 10−8 ohm meter, find the length of the wire.
Q. (a) List the parts of the human eye that control the amount of light entering into it. Explain how they perform this function.
(b) Write the function of retina in human eye.
(c) Do you know that the corneal-impairment can be cured by replacing the defective cornea with the cornea of the donated eye? How and why should we organise groups to motivate the community members to donate their eyes after death?
Q. Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit another set of three bulbs of the same wattage are connected in parallel to the same source.
(a) Will the bulb in the two circuits glow with the same brightness? Justify your answer.
(b) Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.
Q. a) An organic compound A with molecular formula C2H4O2 on reaction with Sodium metal Na releases a gas B which readily catches fire. A on reacting with Ethanol in the presence of concentrated Sulphuric acid gives a sweet smelling substance C used in making perfumes.
Write a balanced chemical equation to represent these two reactions and identify the compounds A, B and C.
(b) Differentiate between metals and non metals?
Q. 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.

 

 

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