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Day 350: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. Asked once: 2021 Paper 3 (same type asked 8 times) See all 8 of this type

    36
    Given below are two statements: Statement-I: CeO2CeO_{2} can be used for oxidation of aldehydes and ketones. Statement-II: Aqueous solution of EuSO4EuSO_{4} is a strong reducing agent.

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  2. Question 2

    Chemical Bonding and Molecular Structure. Asked once: 6 Apr 2023 (same type asked 8 times) See all 8 of this type

    56
    The number of species from the following which have square pyramidal structure is
    PF5,BrF4−,IF5;BrF5,XeOF4,ICl4−PF_{5},BrF_{4}^{-},IF_{5};BrF_{5},XeOF_{4},ICl_{4}^{-}

  3. Question 3

    Alcohols, Phenols and Ethers. Asked once: 30 Jan 2023 (same type asked 8 times) See all 8 of this type

    122
    The correct order of pKapK_{a} values for the following compounds is: (A) (B) (C) (D)

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  4. Question 4

    Structure of Atom. Asked once: 25 Jan 2023 (same type asked 7 times) See all 7 of this type

    42
    The radius of the 2nd 2^{\text{nd~}} orbit of Li2+Li^{2 +} is xx. The expected radius of the 3rd 3^{\text{rd~}} orbit of Be3+Be^{3 +} is

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  5. Question 5

    Chemical Kinetics. Asked once: 25 Jan 2023 (same type asked 7 times) See all 7 of this type

    51
    For the first order reaction A→BA \rightarrow B, the half life is 30 min⁡30\text{ }\min. The time taken for 75%75\% completion of the reaction is ____\_\_\_\_ min. (Nearest integer) Given: log⁡2=0.3010\log2 = 0.3010
    log⁡3=0.4771log⁡5=0.6989\begin{matrix} & \log3 = 0.4771 \\ & \log5 = 0.6989 \end{matrix}