PYQ Vault

Day 285: JEE Mains Chemistry

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

  1. Question 1

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 3 Apr 2025 (same type asked 7 times) See all 7 of this type

    46
    During estimation of nitrogen by Dumas' method of compound X(0.42 g)X(0.42\text{ }g) : _________\_\_\_\_\_\_\_\_\_ mL of N2N_{2} gas will be liberated at STP. (nearest integer) (Given molar mass in gmol−1:C:12,H:1g{mol}^{- 1}:C:12,H:1, N:14)N:14)
  2. Question 2

    Hydrocarbons. Asked once: 31 Jan 2024 (same type asked 7 times) See all 7 of this type

    139
    The correct order of reactivity in electrophilic substitution reaction of the following compounds is:

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  3. Question 3

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 30 Jan 2024 (same type asked 7 times) See all 7 of this type

    43
    In the given reactions identify the reagent AA and reagent BB

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  4. Question 4

    Biomolecules. Asked once: 2021 Paper 26 (same type asked 7 times) See all 7 of this type

    36
    Match List-I with List-II.
    List-IList-II
    (A)Sucrose(i)β\beta-D-Galactose and β\beta-D-Glucose
    (B)Lactose(ii)α\alpha-D-Glucose and β\beta-D-Fructose
    (C)Maltose(iii)α\alpha-D-Glucose and α\alpha-D-Glucose
    Choose the correct answer from the options given below:

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  5. Question 5

    Haloalkanes and Haloarenes. Asked once: 1 Feb 2024 (same type asked 7 times) See all 7 of this type

    32
    Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Haloalkanes react with KCNKCN to form alkyl cyanides as a main product while with AgCNAgCN form isocyanide as the main product. Reason (R): KCNKCN and AgCNAgCN both are highly ionic compounds. In the light of the above statement, choose the most appropriate answer from the options given below:

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