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Day 187: JEE Mains Chemistry

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

  1. Question 1

    Haloalkanes and Haloarenes. Asked once: 30 Jan 2024 (same type asked 2 times) See all 2 of this type

    39
    Example of vinylic halide is

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  2. Question 2

    Chemical Thermodynamics. Asked once: 22 Jan 2025 (same type asked 2 times) See all 2 of this type

    33
    A liquid when kept inside a thermally insulated closed vessel at 25∘C25^{\circ}C was mechanically stirred from outside. What will be the correct option for the following thermodynamic parameters ?

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  3. Question 3

    Electrochemistry. Asked once: 8 Apr 2024 (same type asked 2 times) See all 2 of this type

    135
    The emf of cell Tl∣Tl+(0.001M)∣∣Cu2+(0.01M)∣CuTl\left| \underset{(0.001M)}{Tl^{+}} \right|\left| \underset{(0.01M)}{Cu^{2 +}} \right|Cu is 0.83 V0.83\text{ }V at 298 K298\text{ }K. It could be increased by:

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 23 Jan 2025 (same type asked 2 times) See all 2 of this type

    124
    The bond dissociation enthalpy of X2X_{2}, ΔHbond∘\Delta H_{\text{bond}}^{\circ}, calculated from the given data is _____\_\_\_\_\_ kJmol−1kJmol^{- 1}. (Nearest integer)
    M+X−(s)→M+(g)+X−(g)ΔHlattice ∘=800 kJ mol−1M( s)→M( g)ΔHsub ∘=100 kJ mol−1M( g)→M+(g)+e−(g)ΔH∘ i=500 kJ mol−1X( g)+e−(g)→X−(g)ΔH∘ eg=−300 kJ mol−1M( s)+12X2( g)→M+X−(s)ΔHf∘=−400 kJ mol−1\begin{matrix} & M^{+}X^{-}(s) \rightarrow M^{+}(g) +X^{-}(g)\Delta H_{\text{lattice~}}^{\circ}= 800\text{ }kJ{\text{ }mol}^{- 1} \\ & M(\text{ }s) \rightarrow M(\text{ }g)\Delta H_{\text{sub~}}^{\circ}= 100\text{ }kJ{\text{ }mol}^{- 1} \\ & M(\text{ }g) \rightarrow M^{+}(g)+e^{-}(g)\Delta H^{\circ}\ _{i}= 500\text{ }kJ{\text{ }mol}^{- 1} \\ & X(\text{ }g) +e^{-}(g) \rightarrow X^{-}(g)\Delta H^{\circ}\ _{eg}= - 300\text{ }kJ{\text{ }mol}^{- 1} \\ & M(\text{ }s) +\frac{1}{2}X_{2}(\text{ }g) \rightarrow M^{+}X^{-}(s)\Delta H_{f}^{\circ}= - 400\text{ }kJ{\text{ }mol}^{- 1} \end{matrix}
    [Given : M+X−M^{+}X^{-}is a pure ionic compound and X forms a diatomic molecule X2X_{2} in gaseous state]

  5. Question 5

    Electrochemistry. Asked once: 24 Jan 2025 (same type asked 2 times) See all 2 of this type

    101
    Based on the data given below:
    ECr2O72−/Cr3+0=1.33 VECl2/Cl(−)0=1.36 VEMnO4−/Mn2+0=1.51 VECr3+/Cr0=−0.74 V\begin{matrix} E_{Cr_{2}O_{7}^{2 -}/Cr^{3 +}}^{0}= 1.33\text{ }V & E_{Cl_{2}/Cl^{( - )}}^{0}= 1.36\text{ }V \\ E_{MnO_{4}^{-}/Mn^{2 +}}^{0}= 1.51\text{ }V & E_{Cr^{3 +}/Cr}^{0}= - 0.74\text{ }V \end{matrix}
    the strongest reducing agent is :

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