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Day 51: JEE Mains Chemistry

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

  1. Question 1

    Hydrocarbons. This type asked 3 times: 24 Jan 2026 S1, 28 Jan 2026 S1, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 3 of this type

    38
    Given below are two statements : Statement I: On the basis of inductive effect, the order of stability of alkyl carbanions is CH3−>CH3−CH2−>(CH3)2CH−>(CH3)3C−{CH}_{3}^{-} > {CH}_{3} - {CH}_{2}^{-} > \left( {CH}_{3} \right)_{2}{CH}^{-} > \left( {CH}_{3} \right)_{3}C^{-}. Statement II : Allyl and benzyl carbanions are more stabilised by inductive effect and not by resonance effect. In the light of the above statements choose the correct answer from the options given below

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  2. Question 2

    Some Basic Concepts of Chemistry. This type asked 3 times: 8 Apr 2024, 22 Jan 2026 S2, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 3 of this type

    29
    What is the mole fraction of water in 10%10\% by weight (w/w)(w/w) of aqueous urea solution ? [Given : Molar mass of H,O,CH,O,C and N are 1, 16, 12 and 14 g mol−114\text{ }g{\text{ }mol}^{- 1} respectively]

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  3. Question 3

    The d- and f-Block Elements. This type asked 3 times: 10 Apr 2023, 4 Apr 2026 S1, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 3 of this type

    45
    Statement I : Sodium dichromate and potassium dichromate are classified as primary standard in titrimetric analysis . Statement II : Phenolphthalein is a weak base; therefore it dissociates in acidic medium. In the light of the above statements, choose the correct answer from the options given below

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  4. Question 4

    Aldehydes, Ketones and Carboxylic Acids. This type asked 3 times: 28 Jun 2022, 30 Jan 2024, 2 Apr 2026 S2. This one: 2 Apr 2026 S2 See all 3 of this type

    41
    An organic compound " x " where molar ratio of C , O and H are equal, on treatment with 50%KOH50\% KOH under reflux followed by acidification produced " y ". The most likely structure of " y " is: [Molar mass of ' x ' is 58 g mol−158\text{ }g{\text{ }mol}^{- 1} ]

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  5. Question 5

    Coordination Compounds. This type asked 3 times: 2021 Paper 19, 22 Jan 2025, 2 Apr 2026 S2. This one: 2 Apr 2026 S2 See all 3 of this type

    35
    Given below are two statements : Statement-I : Among Zn,Mn,ScZn,Mn,Sc and Cu , the energy required to remove the third valence electron is highest for Zn and lowest for Sc . Statement-II : The correct order of the following complexes in terms of CFSE is [Co(H2O)6]2+<[Co(H2O)6]3+<[Co(en)3]3+\left\lbrack Co\left( H_{2}O \right)_{6} \right\rbrack^{2 +} < \left\lbrack Co\left( H_{2}O \right)_{6} \right\rbrack^{3 +} < \left\lbrack Co(en)_{3} \right\rbrack^{3 +}. In the light of the above statements, choose the correct answer from the options given below :

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