PYQ Vault

Day 198: CBSE Class 10 Science

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

  1. Question 1

    Heredity. Asked once: 2023 (same type asked 4 times)

    10
    Consider the following two statements : (i) The trait that expresses itself in F1\mathrm{F_1} generation. (ii) The trait that keeps on passing from one generation to another. The appropriate terms for the statements (i) and (ii) respectively are :

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  2. Question 2

    Acids, Bases and Salts. Asked once: 2023 (same type asked 3 times)

    21 (b)
    Two solutions M and N give Red and Blue colour respectively with a universal indicator. (i) In which solution will the hydrogen ion concentration be more ? Justify your answer. (ii) If both M and N solutions are mixed and the resultant mixture is tested with a universal indicator, it turns green. What is the nature of the salt formed ? Justify your answer.

  3. Question 3

    Carbon and its Compounds. Asked once: 2023 (same type asked 3 times)

    36 (a)
    Explain why carbon forms compounds mainly by covalent bonds. Explain in brief two main reasons for carbon forming a large number of compounds. Why does carbon form strong bonds with most other elements ?

  4. Question 4

    Heredity. 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.
    18
    Assertion (A) : Human female has a perfect pair of sex chromosome. Reason (R) : Sex chromosome contributed by the human male in the zygote decides the sex of a child.

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  5. Question 5

    How do Organisms Reproduce?. Asked once: 2024 (same type asked 3 times)

    11
    Which one of the following organism is represented by this diagram ?

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