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Day 95: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. This type asked 2 times: 24 Jan 2025, 28 Jan 2025. This one: 28 Jan 2025 See all 2 of this type

    114
    Given below are two statements : Statement (I) : According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number. Statement (II) : Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers. In the light of the above statements, choose the correct answer from the options given below :

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  2. Question 2

    Haloalkanes and Haloarenes. This type asked 2 times: 29 Jan 2023, 28 Jan 2025. This one: 28 Jan 2025 See all 2 of this type

    113
    The major product of the following reaction is: →KOH/EtOH (excess)Δ\underset{\mathbf{\mathrm{\Delta}}}{\overset{KOH/EtOH\ (excess)}{\rightarrow}} Major product

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  3. Question 3

    Structure of Atom. This type asked 2 times: 14 Jun 2022, 28 Jan 2025. This one: 28 Jan 2025 See all 2 of this type

    38
    In a multielectron atom, which of the following orbitals described by three quantum numbers will have the same energy in the absence of electric and magnetic fields? (A) n=1,l=0,ml=0n = 1,l = 0,m_{l}= 0 (B) n=2,l=0,ml=0n = 2,l = 0,m_{l}= 0 (C) n=2,l=1,ml=1n = 2,l = 1,m_{l}= 1 (D) n=3,l=2,ml=1n = 3,l = 2,m_{l}= 1 (E) n=3,l=2,ml=0n = 3,l = 2,m_{l}= 0 Choose the correct answer from the options given below :

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  4. Question 4

    Aldehydes, Ketones and Carboxylic Acids. This type asked 2 times: 6 Apr 2024, 24 Jan 2025. This one: 24 Jan 2025 See all 2 of this type

    40
    Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

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  5. Question 5

    Chemical Bonding and Molecular Structure. This type asked 2 times: 31 Jan 2024, 24 Jan 2025. This one: 24 Jan 2025 See all 2 of this type

    30
    Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction] ? (A) 2pz2p_{z} and 2px2p_{x} (B) 2 s and 2px2p_{x} (C) 3dxy3d_{xy} and 3dx2−y23d_{x^{2}-y^{2}} (D) 2 s and 2pz2p_{z} (E) 2pz2p_{z} and 3dx2−y23d_{x^{2}-y^{2}}

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