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Day 175: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. Asked once: 4 Apr 2024 (same type asked 3 times) See all 3 of this type

    45
    The element which shows only one oxidation state other than its elemental form is:

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  2. Question 2

    Electrochemistry. Asked once: 1 Feb 2024 (same type asked 3 times) See all 3 of this type

    52
    The potential for the given half-cell at 298 K298\text{ }K is (-)._______×10−2 V\times10^{- 2}\text{ }V.
    2H(aq) ++2e−→H2( g)2H_{\text{(aq)~}}^{+}+ 2e^{-}\rightarrow H_{2}(\text{ }g)
    [H+]=1M,PH2=2 atm\left\lbrack H^{+} \right\rbrack= 1M,P_{H_{2}}= 2\text{ }atm
    (Given: 2.303 RT/F =0.06 V,log⁡2=0.3= 0.06\text{ }V,\log2 = 0.3 )

  3. Question 3

    The d- and f-Block Elements. Asked once: 10 Apr 2023 (same type asked 3 times) See all 3 of this type

    147
    For a metal ion, the calculated magnetic moment is 4.90 BM. This metal ion has _____ number of unpaired electrons.

  4. Question 4

    Chemical Thermodynamics. Asked once: 31 Jan 2024 (same type asked 3 times) See all 3 of this type

    58
    Consider the following reaction at 298 K298\text{ K}. 32O2(g)⇌O3(g)\dfrac{3}{2}O_{2(g)} \rightleftharpoons O_{3(g)}; Kp=2.47×10−29K_{p} = 2.47 \times 10^{-29}. ΔrG⊖\Delta_{r}G^{\ominus} for the reaction is ______ kJkJ. (Given R=8.314 J K−1 mol−1R = 8.314\,J\,K^{-1}\,mol^{-1})

  5. Question 5

    Alcohols, Phenols and Ethers. Asked once: 29 Jan 2024 (same type asked 3 times) See all 3 of this type

    123
    Match List I with List II
    List I (Compound)List II (pKapK_{a} value)
    A.EthanolI.10.0
    B.PhenolII.15.9
    C.m-NitrophenolIII.7.1
    D.p-NitrophenolIV.8.3
    Choose the correct answer from the options given below: -

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