PYQ Vault

Day 116: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. Asked once: 2 Apr 2026 S1 (same type asked 8 times) See all 8 of this type

    34
    Given below are two statements : Statement (I) : The first ionisation enthalpy of the elements Na,Mg,ClNa,Mg,Cl and Ar follows the order Na>Mg>Cl>ArNa > Mg > Cl > Ar. Statement (II) : Among Ca,Al,FeCa,Al,Fe and B , the third ionisation enthalpy is very high for Ca . In the light of the above statements, choose the correct answer from the options given below :

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 4 Apr 2024 (same type asked 8 times) See all 8 of this type

    50
    The correct order of first ionization enthalpy values of the following elements is: (A) OO (B) NN (C) BeBe (D) F (E) BB Choose the correct answer from the options given below:

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  3. Question 3

    The p-Block Elements. Asked once: 4 Apr 2025 (same type asked 8 times) See all 8 of this type

    40
    Given below are the pairs of group 13 elements showing their relation in terms of atomic radius.(B<Al),(Al<Ga),(Ga<In) and (In<Tl)(B < Al),(Al < Ga),(Ga < In)\text{~and~}(In < Tl) Identify the elements present in the incorrect pair and in that pair find out the element (X) that has higher ionic radius (M3+)\left( M^{3 +} \right) that the other one. The atomic number of the element (X)(X) is

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  4. Question 4

    The d- and f-Block Elements. Asked once: 3 Apr 2025 (same type asked 8 times) See all 8 of this type

    29
    The metal ions that have the calculated spin only magnetic moment value of 4.9 B.M. are A. Cr2+Cr^{2 +} B. Fe2+Fe^{2 +} C. Fe3+Fe^{3 +} D. Co2+Co^{2 +} E. Mn3+Mn^{3 +} Choose the correct answer from the options given below.

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  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 24 Jan 2025 (same type asked 8 times) See all 8 of this type

    29
    Which one of the carbocations from the following is most stable?

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