PYQ Vault

Day 162: CBSE Class 10 Science

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

  1. Question 1

    Metals and Non-metals. Asked once: 2025 (same type asked 3 times)

    5
    Reaction between two elements A and B, forms a compound C. A loses electrons and B gains electrons. Which one of the following properties will not be shown by compound C ?

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  2. Question 2

    Metals and Non-metals. Asked once: 2024 (same type asked 3 times)

    Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.
    17
    Assertion (A) : The extraction of metals from their sulphide ores cannot take place without roasting of the ore. Reason (R) : Roasting converts sulphide ores directly into metals.

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  3. Question 3

    Our Environment. Asked once: 2026 (same type asked 3 times)

    3
    An ecosystem contains maximum number of :

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  4. Question 4

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

    15
    In the following groups of wastes, which group contains only non-biodegradable wastes ?

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  5. Question 5

    Our Environment. Asked once: 2022 (same type asked 3 times)

    5 OR
    “The change in packaging has resulted in waste becoming non-biodegradable.” Giving two examples from daily life, justify this statement.