PYQ Vault

Day 186: CBSE Class 10 Science

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

  1. Question 1

    Chemical Reactions and Equations. Asked once: 2023 (same type asked 3 times)

    3
    A metal ribbon ‘X’ burns in oxygen with a dazzling white flame forming a white ash ‘Y’. The correct description of X, Y and the type of reaction is :

    Tap an option to check your answer.

  2. Question 2

    Chemical Reactions and Equations. Asked once: 2024 (same type asked 3 times)

    21 (a)
    Give one example of each of the following : (i) Chemical reaction showing evolution of gas. (ii) Change in the colour of the substance during a chemical reaction.

  3. Question 3

    Control and Coordination. Asked once: 2023 (same type asked 3 times)

    22 (a)
    List two differences between the movement of leaves of a sensitive plant and the movement of a shoot towards light.

  4. Question 4

    Electricity. Asked once: 2023 (same type asked 3 times)

    14
    An electric iron of 1500 W, 200 V and a flash light of 500 W, 200 V are used in homes. The rating of fuse to be used should be

    Tap an option to check your answer.

  5. Question 5

    Electricity. Asked once: 2025 (same type asked 3 times)

    26
    Four resistors, each of resistance 2⋅0 Ω2{\cdot}0\,\Omega, are joined end to end to form a square ABCD as shown. Using appropriate formula, determine the equivalent resistance of the combination between its two ends A and B.