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Day 249: JEE Mains Chemistry

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

  1. Question 1

    The p-Block Elements. Asked once: 10 Apr 2023 (same type asked 4 times) See all 4 of this type

    60
    The sum of lone pairs present on the central atom of the interhalogen IF5IF_{5} and IF7IF_{7} is_

  2. Question 2

    Classification of Elements and Periodicity. Asked once: 25 Jul 2022 (same type asked 4 times) See all 4 of this type

    130
    The total number of acidic oxides from the following list is: NO,N2O,B2O3, N2O5,CONO,N_{2}O,B_{2}O_{3},{\text{ }N}_{2}O_{5},CO, SO3,P4O10SO_{3},P_{4}O_{10}

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  3. Question 3

    Chemical Bonding and Molecular Structure. Asked once: 26 Jul 2022 (same type asked 4 times) See all 4 of this type

    122
    Arrange the following in increasing order of their covalent character. (A) CaF2CaF_{2} (B) CaCl2CaCl_{2} (C) CaBr2CaBr_{2} (D) CaI2CaI_{2} Choose the correct answer from the options given below.

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  4. Question 4

    Alcohols, Phenols and Ethers. Asked once: 2021 Paper 19 (same type asked 4 times) See all 4 of this type

    31
    Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of conc. H2SO4H_{2}SO_{4} ?

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  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 6 Apr 2023 (same type asked 4 times) See all 4 of this type

    60
    In ammonium-phosphomolybdate, the oxidation state of Mo is  +\ ^{+}__