PYQ Vault

Day 100: CBSE Class 10 Science

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

  1. Question 1

    Acids, Bases and Salts. Asked once: 2023 (same type asked 2 times)

    2
    Select the correct option(s) in the following table :
    OptionNatural SourcesAcid present
    (i)TamarindTartaric acid
    (ii)TomatoAcetic acid
    (iii)Ant stingOxalic acid
    (iv)Nettle stingMethanoic acid

    Tap an option to check your answer.

  2. Question 2

    Acids, Bases and Salts. Asked once: 2026 (same type asked 2 times)

    25
    Write the balanced chemical equation for the preparation of : (a) Sodium hydroxide by electrolysis of brine solution (b) Sodium carbonate

  3. Question 3

    Acids, Bases and Salts. Asked once: 2025 (same type asked 2 times)

    22
    Giving reason, state the advantage of using baking powder over baking soda for the preparation of bread or cakes.

  4. Question 4

    Acids, Bases and Salts. Asked once: 2026 (same type asked 2 times)

    27 (b)
    Write the preparation of the following compounds with balanced chemical equation : (i) NaOH\mathrm{NaOH} by chlor-alkali process (ii) Baking Soda (iii) Plaster of Paris

  5. Question 5

    Carbon and its Compounds. Asked once: 2026 (same type asked 2 times)

    20
    Which of the following compounds does not undergo addition reaction ?

    Tap an option to check your answer.