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Day 241: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 9 Apr 2024 (same type asked 4 times) See all 4 of this type

    138
    Which of the following compounds will give silver mirror with ammoniacal silver nitrate? (A) Formic acid (B) Formaldehyde (C) Benzaldehyde (D) Acetone Choose the correct answer from the options given below:

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  2. Question 2

    Coordination Compounds. Asked once: 6 Apr 2024 (same type asked 4 times) See all 4 of this type

    142
    Consider the following reactions
    NiS+HNO3+HCl→A+NO+S+H2ONiS + HNO_{3} + HCl \rightarrow A + NO + S + H_{2}O
    A+NH4OH+H3C−C(=N−OH)−C(=N−OH)−CH3dimethylglyoxime⟶B+NH4Cl+H2OA + NH_{4}OH + \underset{\text{dimethylglyoxime}}{H_{3}C-C(=N-OH)-C(=N-OH)-CH_{3}} \longrightarrow B + NH_{4}Cl + H_{2}O
    The number of protons that do not involve in hydrogen bonding in the product BB is ____ .

  3. Question 3

    Hydrocarbons. Asked once: 1 Feb 2023 (same type asked 4 times) See all 4 of this type

    36
    But-2-yne is reacted separately with one mole of Hydrogen as shown below: A. A is more soluble than B. B. The boiling point & melting point of A are higher and lower than B respectively. C. A is more polar than B because dipole moment of A is zero. D. Br2Br_{2} adds easily to BB than AA. Identify the incorrect statements from the options given below:

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  4. Question 4

    Biomolecules. Asked once: 28 Jul 2022 (same type asked 4 times) See all 4 of this type

    139
    Fructose gives AA with HCNHCN followed by H3O+H_{3}O^{+}, and gives BB with (i) NaBH4NaBH_{4}, (ii) HI/PHI/P. The formulas of AA and BB are

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  5. Question 5

    Chemical Kinetics. Asked once: 8 Apr 2023 (same type asked 4 times) See all 4 of this type

    54
    The number of given statement/s which is/are correct is__ (A) The stronger the temperature dependence of the rate constant, the higher is the activation energy. (B) If a reaction has zero activation energy, its rate is independent of temperature. (C) The stronger the temperature dependence of the rate constant, the smaller is the activation energy. (D) If there is no correlation between the temperature and the rate constant then it means that the reaction has negative activation energy.