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Day 106: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. This type asked 2 times: 2021 Paper 12, 31 Jan 2023. This one: 31 Jan 2023 See all 2 of this type

    34
    When Cu2+Cu^{2 +} ion is treated with KIKI, a white precipitate, XX appears in solution. The solution is titrated with sodium thiosulphate, the compound YY is formed. XX and YY respectively are:

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  2. Question 2

    Electrochemistry. This type asked 2 times: 25 Jan 2023, 30 Jan 2023. This one: 25 Jan 2023 See all 2 of this type

    146
    Pt(s)∣H2(g)(1 bar)∣H+(aq)(1M)∥M3+(aq),M+(aq)∣Pt(s)Pt(s)\mid H_{2}(g)(1\ bar)\mid H^{+}(aq)(1M)\parallel M^{3 +}(aq),M^{+}(aq)\mid Pt(s) The Ecell E_{\text{cell~}} for the given cell is 0.1115 V0.1115\text{ }V at 298 K298\text{ }K when [M+(aq)][M3+(aq)]=10a\frac{\left\lbrack M^{+}(aq) \right\rbrack}{\left\lbrack M^{3 +}(aq) \right\rbrack}=10^{a} The value of aa is
     Given : EM3+/M+θ=0.2 V2.303RTF=0.059 V\begin{matrix} & \text{~Given :~}E^{\theta}_{M^{3 +}/M^{+}}= 0.2\text{ }V \\ & \frac{2.303RT}{F}= 0.059\text{ }V \end{matrix}

  3. Question 3

    Some Basic Concepts of Chemistry. This type asked 2 times: 2021 Paper 15, 30 Jan 2023. This one: 30 Jan 2023 See all 2 of this type

    54
    The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is

  4. Question 4

    Chemical Kinetics. This type asked 2 times: 28 Jul 2022, 29 Jan 2023. This one: 29 Jan 2023 See all 2 of this type

    125
    An indicator ' XX ' is used for studying the effect of variation in concentration of iodide: on the rate of reaction of iodide ion with H2O2H_{2}O_{2} at room temp. The indicator ' XX ' forms blue colored complex with compound ' AA ' present in the solution. The indicator ' XX ' and compound 'A' respectively are

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  5. Question 5

    Coordination Compounds. This type asked 2 times: 2021 Paper 22, 29 Jan 2023. This one: 29 Jan 2023 See all 2 of this type

    143
    The denticity of the ligand present in the Fehling's reagent is