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Day 408: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 24 Jan 2026 S2

    42
    The heat of atomisation of methane and ethane are ' x ' kJmol−1kJmol^{- 1} and ' y ' kJmol−1kJmol^{- 1} respectively. The longest wavelength (λ\lambda) of light capable of breaking the C−CC - C bond can be expressed in SI unit as :

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 24 Jan 2026 S2

    36
    The correct order of C, N, O and F in terms of second ionisation potential is

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  3. Question 3

    Coordination Compounds. Asked once: 8 Apr 2024

    140
    Match List-I with List-II.
    > List-IList-II
    (Complex ion)(Spin only magnetic
    moment in B.M.)
    Choose the correct answer from the options given below :

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  4. Question 4

    Electrochemistry. Asked once: 7 Apr 2025

    48
    1 Faraday electricity was passed through Cu2+{Cu}^{2 +} (1.5 M,1 L)/CuM,1\text{ }L)/Cu and 0.1 Faraday was passed through Ag+(0.2M,1 L)/Ag{Ag}^{+}(0.2M,1\text{ }L)/Ag electrolytic cells. After this the two cells were connected as shown below to make an electrochemical cell. The emf of the cell thus formed at 298 K is ____\_\_\_\_ mV. Given :  ECu2+/Cu∘=0.34 V\ E_{{Cu}^{2 +}/Cu}^{\circ} = 0.34\text{ }V
    EAg+/Ag∘=0.8 VE_{{Ag}^{+}/Ag}^{\circ} = 0.8\text{ }V
    2.303RTF=0.06 V\frac{2.303RT}{F} = 0.06\text{ }V

  5. Question 5

    Equilibrium. Asked once: 28 Jan 2025

    105
    Arrange the following in increasing order of solubility product :
    Ca(OH)2,AgBr,PbS,HgSCa(OH)_{2},AgBr,PbS,HgS

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