PYQ Vault
EbooksTutor

Day 262: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 2021 Paper 9 (same type asked 3 times) See all 3 of this type

    33
    Reaction of Grignard reagent, C2H5MgBrC_{2}H_{5}MgBr with C8H8OC_{8}H_{8}O followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound B,C10H13ClB,C_{10}H_{13}Cl. The Compound BB is:

    Tap an option to check your answer.

  2. Question 2

    Chemical Kinetics. Asked once: 2021 Paper 25 (same type asked 3 times) See all 3 of this type

    57
    An exothermic reaction X→YX \rightarrow Y has an activation energy 30 kJ mol−130\text{ }kJ{\text{ }mol}^{- 1}. If energy change ΔE\Delta E during the reaction is −20 kJ- 20\text{ }kJ, then the activation energy for the reverse reaction in kJkJ is

  3. Question 3

    Some Basic Concepts of Chemistry. Asked once: 30 Jan 2023 (same type asked 3 times) See all 3 of this type

    60
    Some amount of dichloromethane (CH2Cl2)\left( CH_{2}Cl_{2} \right) is added to 671.141 mL671.141\text{ }mL of chloroform (CHCl3)\left( CHCl_{3} \right) to prepare 2.6×10−3M2.6 \times10^{- 3}M solution of CH2Cl2CH_{2}Cl_{2} (DCM). The concentration of DCM is ppm (by mass). Given: atomic mass: C=12C = 12
    H=1H = 1
    Cl=35.5Cl = 35.5
    density of CHCl3=1.49 g cm−3CHCl_{3}= 1.49\text{ }g{\text{ }cm}^{- 3}

  4. Question 4

    Structure of Atom. Asked once: 2021 Paper 13 (same type asked 3 times) See all 3 of this type

    42
    Number of electrons in p-orbitals of Vanadium

  5. Question 5

    Biomolecules. Asked once: 4 Apr 2024 (same type asked 3 times) See all 3 of this type

    44
    Which of the following is the correct structure of L-Glucose?

    Tap an option to check your answer.