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Day 290: JEE Mains Chemistry

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

  1. Question 1

    Chemical Kinetics. Asked once: 13 Apr 2023 (same type asked 6 times) See all 6 of this type

    147
    A(g)→2 B( g)+C(g)A(g) \rightarrow 2\text{ }B(\text{ }g) + C(g) is a first order reaction. The initial pressure of the system was found to be 800 mmHg800\text{ }mmHg which increased to 1600 mmHg1600\text{ }mmHg after 10 min⁡10\text{ }\min. The total pressure of the system after 30 min⁡30\text{ }\min will be ___mmHg\_\_\_ mmHg. (Nearest integer)

  2. Question 2

    The d- and f-Block Elements. Asked once: 15 Apr 2023 (same type asked 6 times) See all 6 of this type

    54
    In Chromyl chloride, the oxidation state of chromium is (+)____

  3. Question 3

    The d- and f-Block Elements. Asked once: 28 Jan 2025 (same type asked 6 times) See all 6 of this type

    102
    The amphoteric oxide among V2O3, V2O4V_{2}O_{3},{\text{ }V}_{2}O_{4} and V2O5V_{2}O_{5} upon reaction with alkali leads to formation of an oxide anion. The oxidation state of V in the oxide anion is :

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  4. Question 4

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 29 Jan 2024 (same type asked 6 times) See all 6 of this type

    134
    Chromatographic technique/s based on the principle of differential adsorption is/are (A) Column chromatography (B) Thin layer chromatography (C) Paper chromatography Choose the most appropriate answer from the options given below:

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  5. Question 5

    The d- and f-Block Elements. Asked once: 29 Jun 2022 (same type asked 6 times) See all 6 of this type

    36
    The electronic configuration of PtPt (atomic number 78)78) is:

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