PYQ Vault

Day 30: CBSE Class 10 Science

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

  1. Question 1

    Light — Reflection and Refraction. Asked 2 times: 2024*, 2025 (* = numbers or wording changed that year)

    11
    Absolute refractive index of water and glass is 43\frac{4}{3} and 32\frac{3}{2} respectively. If the speed of light in glass is 2×1082 \times 10^8 m/s, the speed of light in water is :

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  2. Question 2

    Magnetic Effects of Electric Current. Asked 2 times: 2024*, 2025 (* = numbers or wording changed that year)

    15
    The strength of magnetic field produced inside a long straight current carrying solenoid does not depend upon :

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  3. Question 3

    Magnetic Effects of Electric Current. Asked 2 times: 2023*, 2025 (* = numbers or wording changed that year)

    36 (b)
    (a) Draw the pattern of magnetic field lines of (i) a bar magnet (ii) a current carrying solenoid List two distinguishing features between the two magnetic fields. (b) Study the following three diagrams in which the entry of an electron in a magnetic field is shown. Identify the case in which the magnetic force experienced by the electron is (i) maximum, and (ii) minimum. Give reason for your answers in each case.

  4. Question 4

    Metals and Non-metals. Asked 2 times: 2024*, 2025 (* = numbers or wording changed that year)

    21
    Cinnabar is an ore of a metal ‘X’. When this ore is heated in air, it is first converted into oxide of ‘X’ (XO) and then reduced to metal ‘X’ on further heating. Identify metal ‘X’ and write chemical equations for the reactions that occur in the above processes.

  5. Question 5

    Metals and Non-metals. Asked 2 times: 2024*, 2025 (* = numbers or wording changed that year)

    4
    Study the following cases : (i) CuSO4+Mg⟶\mathrm{CuSO_4 + Mg \longrightarrow} (ii) FeSO4+Pb⟶\mathrm{FeSO_4 + Pb \longrightarrow} (iii) CaSO4+Al⟶\mathrm{CaSO_4 + Al \longrightarrow} (iv) ZnSO4+Ca⟶\mathrm{ZnSO_4 + Ca \longrightarrow} The case/cases in which new product(s) will form is/are :

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