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Day 82: JEE Mains Chemistry

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

  1. Question 1

    Organic Chemistry - Some Basic Principles and Techniques. Asked 2 times: 28 Jun 2022*, 28 Jul 2022 (* = numbers or wording changed that year) See all 2 times it was asked

    60
    On complete combustion of 0.492 g0.492\text{ }g of an organic compound containing C,HC,H and O,0.7938 gO,0.7938\text{ }g of CO2CO_{2} and 0.4428 g0.4428\text{ }g of H2OH_{2}O was produced. The %\% composition of oxygen in the compound is

  2. Question 2

    The d- and f-Block Elements. Asked 2 times: 2021 Paper 26, 27 Jul 2022 See all 2 times it was asked

    129
    In neutral or alkaline solution, MnO4−MnO_{4}^{-}oxidises thiosulphate to:

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  3. Question 3

    Equilibrium. Asked 2 times: 14 Jun 2022*, 29 Jun 2022 (* = numbers or wording changed that year) See all 2 times it was asked

    124
    4.0 moles of argon and 5.0 moles of PCl5PCl_{5} are introduced into an evacuated flask of 100 litre capacity at 610 K610\text{ }K. The system is allowed to equilibrate. At equilibrium, the total pressure of mixture was found to be 6.0 atm6.0\text{ }atm. The KpK_{p} for the reaction is ______ [Given: R=0.082 L atm K−1mol−1R = 0.082\text{ }L\text{ }atm\text{ }K^{-1}mol^{-1}]

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  4. Question 4

    The p-Block Elements. Asked 2 times: 27 Jun 2022, 29 Jun 2022 See all 2 times it was asked

    41
    The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P−HP - H bonds, is:

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  5. Question 5

    The p-Block Elements. Asked 2 times: 2021 Paper 24, 28 Jun 2022 See all 2 times it was asked

    130
    Among the given oxides of nitrogen; N2O,N2O3N_{2}O,N_{2}O_{3}, N2O4N_{2}O_{4} and N2O5N_{2}O_{5}, the number of compound/(s) having N−NN - N bond is :

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