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Day 126: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. Asked once: 1 Feb 2024 (same type asked 6 times) See all 6 of this type

    123
    Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In aqueous solutions Cr2+Cr^{2 +} is reducing while Mn3+Mn^{3 +} is oxidising in nature. Reason (R): Extra stability to half-filled electronic configuration is observed than incompletely filled electronic configuration. In the light of the above statement, choose the most appropriate answer from the options given below:

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 6 Apr 2023 (same type asked 6 times) See all 6 of this type

    35
    The difference between electron gain enthalpies will be maximum between:

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  3. Question 3

    The p-Block Elements. Asked once: 25 Jan 2023 (same type asked 6 times) See all 6 of this type

    43
    Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B]\lbrack B\rbrack, a dibasic acid. [A] and [B]\lbrack B\rbrack are respectively

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  4. Question 4

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 2 Apr 2026 S1 (same type asked 5 times) See all 5 of this type

    38
    Given below are two statements : Statement (I) : 1,2,3-Trihydroxypropane can be separated from water by simple distillation. Statement (II) : An azeotropic mixture cannot be separated by fractional distillation. In the light of the above statements, choose the correct answer from the options given below :

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  5. Question 5

    The d- and f-Block Elements. Asked once: 28 Jan 2026 S1 (same type asked 5 times) See all 5 of this type

    43
    Given below are two statements : Statement I: The number of pairs, following, in which both the ions are coloured in aqueous solution is 3. [  Sc3+,Ti3+],[Mn2+,Cr2+],[Cu2+,Zn2+]\left. \ {Sc}^{3 +},{Ti}^{3 +} \right\rbrack,\left\lbrack {Mn}^{2 +},{Cr}^{2 +} \right\rbrack,\left\lbrack {Cu}^{2 +},{Zn}^{2 +} \right\rbrack and [Ni2+,Ti4+]\lbrack{Ni}^{2 +},{Ti}^{4 +}\rbrack Statement II : Th4+{Th}^{4 +} is the strongest reducing agent among Th4+,Ce4+,Gd3+{Th}^{4 +},{Ce}^{4 +},{Gd}^{3 +} and Eu2+{Eu}^{2 +}. In the light of the above statements, choose the correct answer from the options given below:

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