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Day 219: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. Asked once: 8 Apr 2024 (same type asked 6 times) See all 6 of this type

    38
    For the given hypothetical reactions, the equilibrium constants are as follows:
    X⇌Y;K1=1.0X \rightleftharpoons Y;K_{1}= 1.0
    Y⇌Z;K2=2.0Y \rightleftharpoons Z;K_{2}= 2.0
    Z⇌W;K3=4.0Z \rightleftharpoons W;K_{3}= 4.0
    The equilibrium constant for the reaction X⇌WX \rightleftharpoons W is

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  2. Question 2

    Chemical Bonding and Molecular Structure. Asked once: 8 Apr 2024 (same type asked 6 times) See all 6 of this type

    56
    Number of molecules from the following which are exceptions to octet rule is ______ . CO2,NO2,H2SO4,BF3,CH4,SiF4,ClO2,PCl5CO_{2},NO_{2},H_{2}SO_{4},BF_{3},CH_{4},SiF_{4},ClO_{2},PCl_{5}, BeF2,C2H6,CHCl3,CBr4BeF_{2},C_{2}H_{6},CHCl_{3},CBr_{4}

  3. Question 3

    Coordination Compounds. Asked once: 28 Jun 2022 (same type asked 6 times) See all 6 of this type

    39
    Given below are two statements: Statement I: [Ni(CN)4]2−\lbrack Ni(CN)_{4}\rbrack^{2 -} is a square planar and diamagnetic complex with dsp2dsp^{2} hybridization for NiNi but [Ni(CO)4]\left\lbrack Ni(CO)_{4} \right\rbrack is tetrahedral, paramagnetic and with sp3sp^{3}-hybridisation for NiNi. Statement II: [NiCl4]2−\left\lbrack NiCl_{4} \right\rbrack^{2 -} and [Ni(CO)4]\left\lbrack Ni(CO)_{4} \right\rbrack both have the same d-electron configuration, have the same geometry and are paramagnetic. In the light of the above statements, choose the correct answer from the options given below:

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  4. Question 4

    Some Basic Concepts of Chemistry. Asked once: 24 Jan 2025 (same type asked 6 times) See all 6 of this type

    124
    The hydrocarbon (X) with molar mass 80 g mol−180\text{ }g{\text{ }mol}^{- 1} and 90%90\% carbon has ______\_\_\_\_\_\_ degree of unsaturation.

  5. Question 5

    Structure of Atom. Asked once: 8 Apr 2023 (same type asked 6 times) See all 6 of this type

    143
    The number of atomic orbitals from the following having 5 radial nodes is____
    7 s,7p,6 s,8p,8 d7\text{ }s,7p,6\text{ }s,8p,8\text{ }d