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Day 333: JEE Mains Chemistry

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

  1. Question 1

    Chemical Kinetics. Asked once: 2021 Paper 23 (same type asked 5 times) See all 5 of this type

    57
    For the reaction A→BA \rightarrow B, the rate constant k(k\left( \right. in s   −1)\left. \ \ ^{- 1} \right) is given by
    log⁡10k=20.35−(2.47×103)T\log_{10}k = 20.35 -\frac{\left( 2.47 \times10^{3} \right)}{T}
    The energy of activation in kJmol−1kJmol^{- 1} is (Nearest integer) [Given: R=8.314 J K−1 mol−1R = 8.314\text{ }J{\text{ }K}^{- 1}{\text{ }mol}^{- 1} ]

  2. Question 2

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 6 Apr 2023 (same type asked 5 times) See all 5 of this type

    133
    From the figure of column chromatography given below, identify incorrect statements. A. Compound ' cc ' is more polar than ' aa ' and ' bb ' B. Compound ' aa ' is least polar C. Compound ' bb ' comes out of the column before ' cc ' and after ' aa ' D. Compound ' aa ' spends more time in the column Choose the correct answer from the options given below:

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  3. Question 3

    The p-Block Elements. Asked once: 29 Jan 2025 (same type asked 5 times) See all 5 of this type

    27
    The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.

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  4. Question 4

    Classification of Elements and Periodicity. Asked once: 2021 Paper 26 (same type asked 5 times) See all 5 of this type

    37
    Which pair of oxides is acidic in nature?

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  5. Question 5

    Electrochemistry. Asked once: 2021 Paper 21 (same type asked 5 times) See all 5 of this type

    56
    The resistance of a conductivity cell with cell constant 1.14 cm−11.14\text{ }cm^{- 1}, containing 0.001 M KCl0.001\text{ }M\text{ }KCl at 298 K298\text{ }K is 1500 Ω1500\ \Omega. The molar conductivity of 0.001 M KCl0.001\text{ }M\text{ }KCl solution at 298 K298\text{ }K in S cm2 mol−1S\text{ }cm^{2}\text{ }mol^{- 1} is (Integer answer)