PYQ Vault

Day 126: CBSE Class 10 Science

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

  1. Question 1

    How do Organisms Reproduce?. Asked once: 2023 (same type asked 3 times)

    35 (b)
    (i) What happens when : (1) Leaves of Bryophyllum fall on the soil ? (2) Planaria is cut into many pieces ? (3) Sporangia of Rhizopus on maturation liberate spores ? Mention the modes of reproduction in each of the above three cases. (ii) Write the changes that occur in a flower once the fertilisation has taken place.

  2. Question 2

    How do Organisms Reproduce?. Asked once: 2024 (same type asked 3 times)

    35 (a)
    (a) Name any two sexually transmitted diseases. (b) Prenatal sex determination is prohibited by law. Why ? (c) Name any three methods of contraception stating one side-effect of each.

  3. Question 3

    Life Processes. Asked once: 2026 (same type asked 3 times)

    11
    The leaves of a plant first prepares food ‘P’ by photo-synthesis. Food ‘P’ is then converted to food ‘Q’, which is stored in the leaves if not used immediately. What are ‘P’ and ‘Q’ ? What are the raw materials and conditions required for synthesis of ‘P’ ?

  4. Question 4

    Life Processes. Asked once: 2024 (same type asked 3 times)

    35 (a)
    Design an experiment to demonstrate that carbon dioxide is essential for photosynthesis. Write the observation and conclusion of the experiment.

  5. Question 5

    Life Processes. Asked once: 2026 (same type asked 3 times)

    1
    Identify the part that controls the closing and opening of the stomatal pore in leaves of plants. Select the correct option.

    Tap an option to check your answer.