PYQ Vault

Day 169: CBSE Class 10 Science

5 questions. Try each one first, then open its answer.

  1. Question 1

    How do Organisms Reproduce?. Asked once: 2024 (same type asked 2 times)

    11
    Offsprings formed as a result of sexual reproduction produce more variations because

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  2. Question 2

    How do Organisms Reproduce?. Asked once: 2024 (same type asked 2 times)

    35 (b)
    (a) Name a unisexual and a bisexual flower. (b) Define cross pollination. State how it is carried out. (c) Observe the diagram given below and name the parts marked as ‘A’ and ‘B’. Mention the function of each of these parts.

  3. Question 3

    Life Processes. Asked once: 2023 (same type asked 2 times)

    9
    Water in the root enters due to :

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  4. Question 4

    Light — Reflection and Refraction. Asked once: 2025 (same type asked 2 times)

    11
    A candle flame is placed in front of the reflecting surface of a convex mirror of focal length f. If the distance of the flame from the pole of the mirror is ‘f’, its image is formed :

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  5. Question 5

    Carbon and its Compounds. Asked once: 2022 (same type asked 5 times)

    11 OR
    State the reasons, why carbon cannot (i) Lose four electrons to form C4+\mathrm{C^{4+}} cation, and (ii) Gain four electrons to form C4−\mathrm{C^{4-}} anion. How does carbon overcome this problem to form compounds ?