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Day 54: JEE Mains Chemistry

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

  1. Question 1

    Amines. This type asked 3 times: 31 Jan 2024, 2 Apr 2025, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 3 of this type

    37
    Given below are two statements: Statement I: Griess-Ilosvay test is used for the detection of nitrite ion, which involves the use of sulphanilic acid and α\alpha-naphthylamine reagent. Statement II: In the above test, sulphanilic acid is diazotized by the acidified nitrite ion, which on further coupling with α\alpha-naphthylamine forms an azo-dye. In the light of the above statements, choose the correct answer from the options given below

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  2. Question 2

    Chemical Bonding and Molecular Structure. This type asked 3 times: 2021 Paper 4, 2 Apr 2025, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 3 of this type

    35
    Given below are two statements: Statement I: The number of species among BF4−,SiF4,XeF4{BF}_{4}^{-},{SiF}_{4},{XeF}_{4} and SF4{SF}_{4}, that have unequal E-F bond lengths is two. Here, E is the central atom. Statement II: Among O2−,O22−,F2O_{2}^{-},O_{2}^{2 -},F_{2} and O2+,O2−O_{2}^{+},O_{2}^{-}has the highest bond order. In the light of the above statements, choose the correct answer from the options given below

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  3. Question 3

    Classification of Elements and Periodicity. This type asked 3 times: 28 Jan 2025, 7 Apr 2025, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 3 of this type

    44
    In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.

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  4. Question 4

    Hydrocarbons. This type asked 3 times: 28 Jul 2022, 27 Jan 2024, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 3 of this type

    40
    Ph−CH=CH2Ph - CH =CH_{2} →(PhCOO)2HBr Product\underset{HBr\ }{\overset{(PhCOO)_{2}}{\rightarrow}}Product Consider the above reaction (A) The reaction proceeds through a more stable radical intermediate. (B) The role of peroxide is to generate H˙\dot{H} (Hydrogen radical). (C) During this reaction, benzene is formed as a by-product. (D) 1-Bromo-2-phenylethane is formed as the minor product. (E) The same reaction in absence of peroxide proceeds via carbocation intermediate. Identify the correct statements. Choose the correct answer from the options given below:

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  5. Question 5

    Structure of Atom. This type asked 3 times: 23 Jan 2025, 24 Jan 2026 S2, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 3 of this type

    41
    The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to Balmer series. ( R=R = Rydberg constant)

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