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Day 294: JEE Mains Chemistry

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

  1. Question 1

    Chemical Kinetics. Asked once: 27 Jun 2022 (same type asked 5 times) See all 5 of this type

    148
    It has been found that for a chemical reaction with rise in temperature by 9 K9\ K the rate constant gets doubled. Assuming a reaction to be occurring at 300 K300\ K, the value of activation energy is found to be _____ kJ mol−1kJ\ mol^{-1}. [nearest integer] (Given ln⁡10=2.3\ln 10 = 2.3, R=8.3 J K−1 mol−1R = 8.3\ J\ K^{-1}\ mol^{-1}, log⁡2=0.30\log 2 = 0.30)

  2. Question 2

    Solutions. Asked once: 2021 Paper 22 (same type asked 5 times) See all 5 of this type

    48
    Which one of the following 0.10M0.10M aqueous solutions will exhibit the largest freezing point depression?

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  3. Question 3

    The p-Block Elements. Asked once: 29 Jul 2022 (same type asked 5 times) See all 5 of this type

    129
    When borax is heated with CoOCoO on a platinum loop, blue coloured bead formed is largely due to :

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  4. Question 4

    Solutions. Asked once: 28 Jul 2022 (same type asked 5 times) See all 5 of this type

    144
    A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm0.8\text{ }atm is in equilibrium with an ideal liquid solution. The mole fraction of substance AA is 0.5 in the vapour phase and 0.2 in the liquid phase. The vapour pressure of pure liquid AA is___ atm. (Nearest integer)

  5. Question 5

    Biomolecules. Asked once: 24 Jan 2023 (same type asked 5 times) See all 5 of this type

    149
    Total number of tripeptides possible by mixing of valine and proline is