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Day 508: JEE Mains Chemistry

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

  1. Question 1

    Chemical Kinetics. Asked once: 28 Jul 2022

    56
    For the given first order reaction
    A→BA \rightarrow B
    the half-life of the reaction is 0.3010 min⁡0.3010\text{ }\min. The ratio of the initial concentration of reactant to the concentration of reactant at time 2.0 min⁡2.0\text{ }\min will be equal to . ___(Nearest integer)

  2. Question 2

    Chemical Thermodynamics. Asked once: 10 Apr 2023

    143
    The number of endothermic process/es from the following is___ A. I2( g)→2I(g)I_{2}(\text{ }g) \rightarrow 2I(g) B. HCl(g)→H(g)+Cl(g)HCl(g) \rightarrow H(g) + Cl(g) C. H2O(l)→H2O(g)H_{2}O(l) \rightarrow H_{2}O(g) D. C(s)+O2( g)→CO2( g)C(s) +O_{2}(\text{ }g) \rightarrow CO_{2}(\text{ }g) E. Dissolution of ammonium chloride in water

  3. Question 3

    Classification of Elements and Periodicity. Asked once: 10 Apr 2023

    55
    In the following reactions, the total number of oxygen atoms in XX and YY is__
    Na2O+H2O→2XNa_{2}O +H_{2}O \rightarrow 2X
    Cl2O7+H2O→2YCl_{2}O_{7}+H_{2}O \rightarrow 2Y

  4. Question 4

    Electrochemistry. Asked once: 2021 Paper 23

    35
    Match List-I with List-II.
    List-I (Parameter)List-II (Unit)
    (A)Cell constant(i)S cm2 mol−1S\ cm^{2}\ mol^{-1}
    (B)Molar conductivity(ii)Dimensionless
    (C)Conductivity(iii)m−1m^{-1}
    (D)Degree of dissociation of electrolyte(iv)Ω−1 m−1\Omega^{-1}\ m^{-1}
    Choose the most appropriate answer from the options given below:

    Tap an option to check your answer.

  5. Question 5

    Haloalkanes and Haloarenes. Asked once: 6 Apr 2023

    50
    For the reaction: The correct statement is :

    Tap an option to check your answer.