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Day 163: JEE Mains Chemistry

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

  1. Question 1

    Solutions. Asked once: 29 Jul 2022 (same type asked 3 times) See all 3 of this type

    55
    If O2O_{2} gas is bubbled through water at 303 K303\text{ }K, the number of millimoles of O2O_{2} gas that dissolve in 1 litre of water is ____. (Nearest Integer) (Given: Henry's Law constant for O2O_{2} at 303 K303\text{ }K is 46.8246.82 k bar and partial pressure of O2=0.920O_{2} = 0.920 bar) (Assume solubility of O2O_{2} in water is too small, nearly negligible)

  2. Question 2

    Amines. Asked once: 26 Jul 2022 (same type asked 3 times) See all 3 of this type

    47
    The correct stability order of the following diazonium salt is (A) (B) (C) (D)

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  3. Question 3

    Chemical Kinetics. Asked once: 21 Jan 2026 S1 (same type asked 3 times) See all 3 of this type

    46
    Pre-exponential factors of two different reactions of same order are identical. Let activation energy of first reaction exceeds the activation energy of second reaction by 20 kJ mol−120\text{ }kJ{\text{ }mol}^{- 1}. If k1k_{1} and k2k_{2} are the rate constants of first and second reaction respectively at 300 K , then In k2k1\frac{k_{2}}{k_{1}} will be (nearest integer) [R=8.3 J K−1 mol−1]\left\lbrack R = 8.3\text{ }J{\text{ }K}^{- 1}{\text{ }mol}^{- 1} \right\rbrack

  4. Question 4

    Coordination Compounds. Asked once: 7 Apr 2025 (same type asked 3 times) See all 3 of this type

    44
    An octahedral complex having molecular composition Co.5NH3.Cl2.SO4Co.5NH_{3}.Cl_{2}.SO_{4} has two isomers A and B . The solution of A gives a white precipitate with AgNO3AgNO_{3} solution and the solution of B gives white precipitate with BaCl2BaCl_{2} solution. The type of isomerism exhibited by the complex is,

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  5. Question 5

    Biomolecules. Asked once: 24 Jan 2025 (same type asked 3 times) See all 3 of this type

    36
    The carbohydrates "Ribose" present in DNA, is (A) A pentose sugar (B) present in pyranose form (C) in "D" configuration (D) a reducing sugar, when free (E) in α\alpha-anomeric form Choose the correct answer from the options given below :

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