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Day 189: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. Asked once: 31 Jan 2024 (same type asked 2 times) See all 2 of this type

    49
    Consider the oxides of group 14 elements SiO2,GeO2,SnO2,PbO2,COSiO_{2},GeO_{2},SnO_{2},PbO_{2},CO and GeOGeO. The amphoteric oxides are

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  2. Question 2

    Some Basic Concepts of Chemistry. Asked once: 24 Jan 2023 (same type asked 2 times) See all 2 of this type

    56
    Uracil is a base present in RNA with the following structure. % of NN in uracil is

  3. Question 3

    Biomolecules. Asked once: 1 Feb 2024 (same type asked 2 times) See all 2 of this type

    31
    If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is:

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 28 Jun 2022 (same type asked 2 times) See all 2 of this type

    123
    In the structure of SF4SF_{4}, the lone pair of electrons on SS is in.

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  5. Question 5

    Chemical Kinetics. Asked once: 1 Feb 2023 (same type asked 2 times) See all 2 of this type

    148
    A→BA \rightarrow B The above reaction is of zero order. Half-life of this reaction is 50 min⁡50\text{ }\min. The time taken for the concentration of A to reduce to one-fourth of its initial value is ____\_\_\_\_ min. (Nearest integer)