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Day 98: JEE Mains Chemistry

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

  1. Question 1

    Electrochemistry. This type asked 2 times: 6 Apr 2023, 9 Apr 2024. This one: 9 Apr 2024 See all 2 of this type

    54
    The standard reduction potentials at 298 K298\text{ }K for the following half cells are given below:
    Cr2O7 2−+14H++6e−→2Cr3++7H2O,E∘=1.33 VCr_{2}O_{7}\ ^{2 -}+ 14H^{+}+ 6e^{-}\rightarrow 2Cr^{3 +}+ 7H_{2}O,E^{\circ}= 1.33\text{ }V
    Fe3+(aq)+3e−→Fe E∘=−0.04 VFe^{3 +}(aq) + 3e^{-}\rightarrow Fe\ E^{\circ}= - 0.04\text{ }V
    Ni2+(aq)+2e−→Ni E∘=−0.25 VNi^{2 +}(aq) + 2e^{-}\rightarrow Ni\ E^{\circ}= - 0.25\text{ }V
    Ag+(aq)+e−→Ag E∘=0.80 VAg^{+}(aq) +e^{-}\rightarrow Ag\ E^{\circ}= 0.80\text{ }V
    Au3+(aq)+3e−→Au E∘=1.40 VAu^{3 +}(aq) + 3e^{-}\rightarrow Au\ E^{\circ}= 1.40\text{ }V
    Consider the given electrochemical reactions, The number of metal(s) which will be oxidized by Cr2O72−Cr_{2}O_{7}^{2 -}, in aqueous solution is ____

  2. Question 2

    Hydrocarbons. This type asked 2 times: 4 Apr 2024, 9 Apr 2024. This one: 9 Apr 2024 See all 2 of this type

    47
    Identify the product AA and product BB in the following set of reactions.

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  3. Question 3

    Aldehydes, Ketones and Carboxylic Acids. This type asked 2 times: 5 Apr 2024, 8 Apr 2024. This one: 8 Apr 2024 See all 2 of this type

    145
    Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous NaOHNaOH after heating gives xx as the major product. The number of π\pi bonds in the product xx is

  4. Question 4

    Biomolecules. This type asked 2 times: 2021 Paper 7, 8 Apr 2024. This one: 8 Apr 2024 See all 2 of this type

    144
    The total number of carbon atoms present in tyrosine, an amino acid, is ___ .

  5. Question 5

    Chemical Bonding and Molecular Structure. This type asked 2 times: 27 Jul 2022, 8 Apr 2024. This one: 8 Apr 2024 See all 2 of this type

    123
    When ΨA\Psi_{A} and ΨB\Psi_{B} are the wave functions of atomic orbitals, then σ∗\sigma^{*} is represented by :

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