PYQ Vault

Day 428: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 7 Apr 2025

    107
    The correct statement amongst the following is :

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 29 Jan 2025

    45
    Given below are two statements : Statement (I): The radii of isoelectronic species increases in the order.
    Mg2+<Na+<F−<O2−Mg^{2 +}<Na^{+}<F^{-}<O^{2 -}
    Statement (II) : The magnitude of electron gain enthalpy of halogen decreases in the order.
    Cl>F>Br>ICl > F > Br > I
    In the light of the above statements, choose the most appropriate answer from the options given below :

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  3. Question 3

    Coordination Compounds. Asked once: 8 Apr 2023

    148
    The observed magnetic moment of the complex [Mn(NCS‾)6]x−\left\lbrack Mn(\underline{NCS})_{6} \right\rbrack^{x -} is 6.06BM6.06BM. The numerical value of xx is___
  4. Question 4

    Electrochemistry. Asked once: 28 Jan 2025

    46
    Given below is the plot of the molar conductivity vs concentration\sqrt{\text{concentration}} for KCl in aqueous solution. If, for the higher concentration of KCl solution, the resistance of the conductivity cell is 100 Ω100\,\Omega, then the resistance of the same cell with the dilute solution is x Ωx\,\Omega. The value of xx is ______\_\_\_\_\_\_ (Nearest integer)
  5. Question 5

    Equilibrium. Asked once: 6 Apr 2024

    48
    At −20∘C-20^{\circ}C and 1 atm1\text{ }atm pressure, a cylinder is filled with equal number of H2H_{2}, I2I_{2} and HIHI molecules for the reaction H2( g)+I2( g)⇌2HI(g)H_{2}(\text{ }g) +I_{2}(\text{ }g) \rightleftharpoons 2HI(g), the KPK_{P} for the process is x×10−1x \times10^{- 1}. The value of xx is ____\_\_\_\_. [Given: R=0.082 L atm K−1 mol−1R = 0.082\text{ }L\text{ }atm{\text{ }K}^{- 1}{\text{ }mol}^{- 1} ]

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