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Day 388: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 5 Apr 2026 S2

    30
    The correct order of molar heat capacities measured at 298 K and 1 bar is :

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 6 Apr 2026 S2

    33
    In a period, the first ionization enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme right element, except noble gases, are respectively.

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  3. Question 3

    Coordination Compounds. Asked once: 23 Jan 2026 S1

    50
    The crystal field splitting energy of [Co( oxalate )3]3−\left\lbrack Co(\text{~oxalate~})_{3} \right\rbrack^{3 -} complex is ' n ' times that of the [Cr(oxalate)3]3−\left\lbrack Cr(\text{oxalate})_{3} \right\rbrack^{3 -} complex. Here ' n ' is ____\_\_\_\_ . [Assume Δ0≫P\Delta_{0} \gg P ]

  4. Question 4

    Electrochemistry. Asked once: 6 Apr 2026 S2

    32
    For a general redox reaction Anode  Red1→Ox1 n1++n1e−\ Red_{1}\rightarrow Ox_{1}\ ^{n_{1}^{+}}+n_{1}e^{-} Cathode Ox2+n2e−→Red2 n2−Ox_{2}+n_{2}e^{-}\rightarrow Red_{2}\ ^{n_{2}-} Which of the following statement is incorrect?

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  5. Question 5

    Equilibrium. Asked once: 5 Apr 2026 S1

    49
    The values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been given below: A(g)⇌B(g)+C(g)A(g) \rightleftharpoons B(g) + C(g)
    1T (K−1)\frac{1}{T}\ (K^{-1})log⁡10Kp\log_{10}K_{p}
    0.053.5
    0.062.5
    0.071.5
    The magnitude of ΔH∘R\frac{\Delta H^{\circ}}{R} calculated from the above data is ____\_\_\_\_ .(Nearest integer)