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Day 495: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 27 Jan 2024

    54
    If three moles of an ideal gas at 300 K300\text{ }K expand isothermally from 30dm330dm^{3} to 45dm345dm^{3} against a constant opposing pressure of 80kPa80kPa, then the amount of heat transferred is _______ JJ.

  2. Question 2

    Classification of Elements and Periodicity. Asked once: 29 Jan 2024

    31
    Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The first ionisation enthalpy decreases across a period. Reason R: The increasing nuclear charge outweighs the shielding across the period. In the light of the above statements, choose the most appropriate from the options given below:

    Tap an option to check your answer.

  3. Question 3

    Electrochemistry. Asked once: 24 Jan 2023

    131
    Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.

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  4. Question 4

    Haloalkanes and Haloarenes. Asked once: 29 Jan 2024

    40
    Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom. Reason R: Phenols react with halogen acids violently. In the light of the above statements, choose the most appropriate from the options given below:

    Tap an option to check your answer.

  5. Question 5

    Hydrocarbons. Asked once: 22 Jan 2025

    121
    The compound with molecular formula C6H6C_{6}H_{6}, which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ________\_\_\_\_\_\_\_\_ π\pi electrons.