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Day 338: JEE Mains Chemistry

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

  1. Question 1

    Chemical Bonding and Molecular Structure. Asked once: 2021 Paper 21 (same type asked 5 times) See all 5 of this type

    35
    The compound/s which will show significant intermolecular HH-bonding is/are: (A) (B) (C)

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  2. Question 2

    Coordination Compounds. Asked once: 2021 Paper 18 (same type asked 5 times) See all 5 of this type

    31
    Which one of the following complexes is violet in colour?

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  3. Question 3

    Chemical Kinetics. Asked once: 25 Jun 2022 (same type asked 5 times) See all 5 of this type

    144
    At 45 K45\text{ }K, the half -life for the decomposition of a sample of a gaseous compound initially at 55.5kPa55.5kPa was 340 s340\text{ }s. When the pressure was 27.8kPa27.8kPa, the half life was found to be 170 s170\text{ }s. The order of the reaction is [integer answer]

  4. Question 4

    Chemical Thermodynamics. Asked once: 2021 Paper 21 (same type asked 5 times) See all 5 of this type

    60
    Data given for the following reaction is as follows:
    FeO(s)+C(graphite)⟶Fe(s)+CO(g)FeO_{(s)} + C_{\text{(graphite)}} \longrightarrow Fe_{(s)} + CO_{(g)}
    SubstanceΔH∘ (kJ mol−1)\Delta H^{\circ}\ \left( kJ\ mol^{- 1} \right)ΔS∘ (J mol−1 K−1)\Delta S^{\circ}\ \left( J\ mol^{- 1}\ K^{- 1} \right)
    FeO(s)FeO_{(s)}-266.357.49
    C(graphite)C_{\text{(graphite)}}05.74
    Fe(s)Fe_{(s)}027.28
    CO(g)CO_{(g)}-110.5197.6
    The minimum temperature in KK at which the reaction becomes spontaneous is (Integer answer)

  5. Question 5

    Coordination Compounds. Asked once: 2021 Paper 20 (same type asked 5 times) See all 5 of this type

    55
    1 mol1\text{ }mol of an octahedral metal complex with formula MCl3⋅2 LMCl_{3}\cdot 2\text{ }L on reaction with excess of AgNO3AgNO_{3} gives 1 mol of AgClAgCl. The denticity of Ligand LL is ____ . (Integer answer)