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Day 22: JEE Mains Chemistry

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

  1. Question 1

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 5 times: 2021 Paper 15, 29 Jun 2022, 25 Jul 2022, 1 Feb 2024, 22 Jan 2026 S2. This one: 22 Jan 2026 S2 See all 5 of this type

    31
    When 1 g of compound ( X ) is subjected to Kjeldahl's method for estimation of nitrogen, 15 mL,1MH2SO4mL,1MH_{2}SO_{4} was neutralized by ammonia evolved. The percentage of nitrogen in compound (X)(X) is :

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  2. Question 2

    Chemical Kinetics. This type asked 5 times: 5 Apr 2024, 9 Apr 2024, 28 Jan 2025, 4 Apr 2025, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 5 of this type

    37
    A → products (First order reaction). Three sets of experiment were performed for a reaction under similar experimental conditions. Run 1⇒100 mL1 \Rightarrow 100\text{ }mL of 10 M solution of reactant A Run 2⇒200 mL2 \Rightarrow 200\text{ }mL of 10 M solution of reactant A Run 3⇒100 mL3 \Rightarrow 100\text{ }mL of 10 M solution of reactant A+A + 100 mL of H2OH_{2}O added. The correct variation of rate of reaction is

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  3. Question 3

    Electrochemistry. This type asked 5 times: 2021 Paper 17, 2021 Paper 19, 2021 Paper 26, 30 Jan 2023, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 5 of this type

    47
    Consider the following electrochemical cell at 298 K Pt∣HSnO2−(aq)∣Sn(OH)6 2−(aq)∣Bi2O3(s)∣Bi(s)Pt\left| {HSnO}_{2}^{-}(aq) \right|Sn(OH)_{6}\ ^{2 -}(aq)\left| {Bi}_{2}O_{3}(s) \right|Bi(s). If the reaction quotient at a given time is 10610^{6}, then the cell EMF (Ecell E_{\text{cell~}}) is ____\_\_\_\_ ×10−1 V\times 10^{- 1}\text{ }V (Nearest integer). Given the standard half-cell reduction potential as EBi2O3/Bi,OH−0=−0.44 VE_{{Bi}_{2}O_{3}/{Bi}_{,{OH}^{-}}}^{0} = - 0.44\text{ }V and
    ESn(OH)62−/HSnO2−,OH0=−0.90 VE_{Sn(OH)_{6}^{2 -}/{HSnO}_{2}^{-},OH}^{0} = - 0.90\text{ }V

  4. Question 4

    Haloalkanes and Haloarenes. This type asked 5 times: 2021 Paper 22, 30 Jan 2023, 23 Jan 2025, 29 Jan 2025, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 5 of this type

    42
    The correct order of the rate of reaction of the following reactants with nucleophile by SN1S_{N}1 mechanism is : (Given : Structure I and II are rigid)

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  5. Question 5

    Biomolecules. This type asked 5 times: 29 Jun 2022, 25 Jul 2022, 27 Jan 2024, 5 Apr 2024, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 5 of this type

    36
    The correct statements are: (A) Activation energy for enzyme catalysed hydrolysis of sucrose is lower than that of acid catalysed hydrolysis. (B) During denaturation, secondary and tertiary structures of a protein are destroyed but primary structure remains intact. (C) Nucleotides are joined together by glycosidic linkage between C1C_{1} and C4C_{4} carbons of the pentose sugar (D) Quaternary structure of proteins represents overall folding of the polypeptide chain. Choose the correct answer from the options given below:

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