CBSE Class 10 Science Exam 2026 Repeated Questions

CBSE Class 10 Science Exam 2026 Repeated Questions : In the syllabus, there are some important topics from which the questions are asked every year. During preparation, you should focus on such topics or questions and practice them well. Accordingly, you can practice solving such questions and can learn how to answer accurately while managing the time in the final exam. We have provided some of the repeated questions in the article below. Along with that, you can also go through the CBSE Class 10 Science Weightage 2026 of all the chapters to pick the chapters based on the marking scheme. You can pick the high-weightage topics first as the questions are generally repeated from the important topics. You can check more details below.

Also Read CBSE Class 10 Science Previous Year Question Paper

CBSE Class 10 Science Exam 2026 Repeated Questions

Q1. Which of the following is a correct combination of function and part of the brain?

1. Posture and balance: Cerebrum
2. Salivation: Medulla in midbrain
3. Hunger: Pons in hindbrain
4. Blood pressure: Medulla in hindbrain

Q2. In a genetic experiment, plants with pure round green seeds (RRyy) were crossed with plants with wrinkled yellow seeds (rrYY).

(i) Show the gametes formed when F1 was self-pollinated.

(ii) A total of 144 seeds were produced which developed into saplings. Show the ratio in which these traits are independently inherited in these 144 sapling.

Q3. Annie was conducting research on the number of fruits produced by watermelon under different conditions. She grew 25 watermelon plants each in both glass house A and B. She introduced pollinators in glass house A only.

(i) What difference will she observe in the number of fruits produced in the two glass houses? Explain with reason.

(ii) List 3 changes that will occur in a flower once it gets fertilized.

Also Read CBSE Class 10 Science Sample Papers 2025-26

Q4. How is the mode of action in beating the heart different from reflex actions? Give four examples.

Q5. How is lymph an important fluid involved in transportation? If lymphatic vessels get blocked, how would it affect the human body? Elaborate.

Q6. A student fixes a white sheet of paper on a drawing board. He places a bar magnet in the centre and sprinkles some iron filings uniformly around the bar magnet. Then he taps gently and observes that iron filings arrange themselves in a certain pattern.

(a) Why do iron filings arrange themselves in a particular pattern?

(b) Which physical quantity is indicated by the pattern of field lines around the bar magnet?

(c) State any two properties of magnetic field lines.

Q7. Pooja has green eyes while her parents and brother have black eyes. Pooja’s husband Ravi has black eyes while his mother has green eyes and father has black eyes.

(a) On the basis of the above given information, is the green eye colour a dominant or recessive trait? Justify your answer.

(b) What is the possible genetic makeup of Pooja’s brother’s eye colour?

(c) What is the probability that the offspring of Pooja and Ravi will have green eyes?

Also, show the inheritance of eye colour in the offspring with the help of a suitable cross.

Q8. Silver chloride when kept in the open turns grey. Illustrate this with a balanced chemical equation.

Q9. Refractive index of water with respect to air is 1.33 and that of diamond is 2.42.

(i) In which medium does the light move faster, water or diamond?

(ii) What is the refractive index of diamond with respect to water?

Q10. When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is

(a) real
(b) inverted
(c) virtual and inverted
(d) virtual and erect

You are also advised to check the CBSE Class 10 Science Syllabus 2025-26 . After completing the syllabus, you can start the regular practice of solving these questions in order to improve the marks.