PYQ Vault

Day 455: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 9 Apr 2024

    44
    What is the structure of CC ?

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  2. Question 2

    Amines. Asked once: 28 Jan 2025

    118
    Identify correct statements : (A) Primary amines do not give diazonium salts when treated with NaNO2NaNO_{2} in acidic condition. (B) Aliphatic and aromatic primary amines on heating with CHCl3CHCl_{3} and ethanolic KOH form carbylamines. (C) Secondary and tertiary amines also give carbylamine test. (D) Benzenesulfonyl chloride is known as Hinsberg's reagent. (E) Tertiary amines reacts with benzenesulfonyl chloride very easily. Choose the correct answer from the options given below :

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  3. Question 3

    Biomolecules. Asked once: 12 Apr 2023

    53
    In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of sp2sp^{2} hybridised carbons is___
  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 15 Apr 2023

    35
    Consider the following statements: (A) NF3NF_{3} molecule has a trigonal planar structure. (B) Bond length of N2N_{2} is shorter than O2O_{2}. (C) Isoelectronic molecules or ions have identical bond order. (D) Dipole moment of H2 SH_{2}\text{ }S is higher than that of water molecule. Choose the correct answer from the option below:

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  5. Question 5

    Chemical Kinetics. Asked once: 22 Jan 2025

    104
    Consider the given figure and choose the correct option :

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