PYQ Vault

Day 79: CBSE Class 10 Science

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

  1. Question 1

    Life Processes. Asked once: 2026 (same type asked 4 times)

    10
    What is the function of diaphragm in human respiratory system ? Where is it present in human body ?

  2. Question 2

    Life Processes. Asked once: 2026 (same type asked 4 times)

    11
    What kind of respiration provides more energy and why ?

  3. Question 3

    Light — Reflection and Refraction. Asked once: 2025 (same type asked 4 times)

    24
    An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm. Use lens formula to find the position of the image formed in this case.

  4. Question 4

    Light — Reflection and Refraction. Asked once: 2026 (same type asked 4 times)

    33
    Draw the ray diagram for the image formation by a lens which shows a magnification of +2+2.

  5. Question 5

    Light — Reflection and Refraction. Asked once: 2026 (same type asked 4 times)

    33
    (a) Define absolute refractive index of an optical medium. (b)
    Material MediumRefractive Index
    A1.50
    B1.46
    C1.31
    D1.77
    Arrange these material mediums given in the table in increasing order of speed of light through them.