PYQ Vault

Day 73: CBSE Class 10 Science

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

  1. Question 1

    Electricity. This type asked 2 times: 2022, 2024. This one: 2024

    33
    List three advantages of parallel circuits in domestic wiring.

  2. Question 2

    Carbon and its Compounds. Asked once: 2025 (same type asked 5 times)

    34 (B)
    (i) Give reason why carbon can neither form C4+\mathrm{C^{4+}} cations nor C4−\mathrm{C^{4-}} anions but forms covalent compounds. (ii) What is meant by functional group in carbon compounds ? Write in tabular form the structural formula and the functional group present in the following compounds : (a) Ethanol (b) Ethanoic acid

  3. Question 3

    Electricity. Asked once: 2025 (same type asked 5 times)

    26
    An electric kettle is rated 230 V; 1000 W. Calculate the resistance of its heating element when in operation.

  4. Question 4

    Magnetic Effects of Electric Current. Asked once: 2026 (same type asked 5 times)

    33 (B)
    How is an electromagnet made ? Write any two ways by which the strength of electromagnet can be increased.

  5. Question 5

    Magnetic Effects of Electric Current. Asked once: 2025 (same type asked 5 times)

    26
    What are magnetic field lines. List two important properties of magnetic field lines.