PYQ Vault

Day 58: CBSE Class 10 Science

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

  1. Question 1

    The Human Eye and the Colourful World. This type asked 3 times: 2023, 2025, 2026. This one: 2026

    34 (b)
    Why is the concave lens used as a corrective lens for a myopic eye ?

  2. Question 2

    The Human Eye and the Colourful World. This type asked 3 times: 2024, 2025, 2026. This one: 2026

    34 (b)
    With the help of a ray diagram, explain any phenomenon of formation of spectrum in nature.

  3. Question 3

    Acids, Bases and Salts. This type asked 3 times: 2023, 2024, 2025. This one: 2025

    2
    You have three aqueous solutions A, B and C as given below : A - Potassium nitrate B - Ammonium chloride C - Sodium carbonate The ascending order of the pH of these solutions is :

    Tap an option to check your answer.

  4. Question 4

    Acids, Bases and Salts. This type asked 3 times: 2023, 2024, 2025. This one: 2025

    6
    The nature of aqueous solution of potassium nitrate is :

    Tap an option to check your answer.

  5. Question 5

    Carbon and its Compounds. This type asked 3 times: 2022, 2024, 2025. This one: 2025

    36 (b)
    (i) Give reason why carbon forms compounds mainly by covalent bonding. (ii) Why do covalent compounds have low melting and boiling points. (iii) Give reason for the following : I. Covalent compounds are bad conductors of electricity. II. Carbon shows catenation.