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Friday, 9 October

JEE Main Chemistry · Class 11

Classification of Elements and Periodicity in Properties: JEE Main previous year questions

Classification of Elements and Periodicity in Properties had 39 questions in the 42 JEE Main shifts Lumi analysed, about 0.8 a shift, asked in 34 of 42 shifts. It ranks 17 of 30 Chemistry chapters by questions; 3% of its questions were hard.

Questions
39
in 34 of 42 shifts
A shift, on average
0.8
of 25 Chemistry questions
Since 2024
+0.3
0.7 a shift in 2017–23, 1.0 in 2024–26
Numerical answer
2
5% of its questions

Year by year

How often it came

Questions in the analysed shifts of each year. Years differ in how many shifts Lumi analysed, so read the bars with the shift count.

Questions each year
05101’174’204’212’222’238’249’259’26

2017: 1 shifts · 2020: 4 shifts · 2021: 4 shifts · 2022: 4 shifts · 2023: 4 shifts · 2024: 8 shifts · 2025: 8 shifts · 2026: 9 shifts

Difficulty by year
  • 20171
  • 20204
  • 20214
  • 20222
  • 20232
  • 20248
  • 20259
  • 20269
  • Easy
  • Medium
  • Hard

Inside the chapter

Topics and the ideas that repeat

3 topics and 16 distinct ideas; 8 ideas were asked more than once. Most questions are single correct and recall.

Topics, by questions

3 questions had no close topic in our taxonomy and are counted for the chapter only.

Ideas asked most
8 repeat

Study it on Lumi

Classification of Elements and Periodicity in Properties: the interactive lesson

Every question

All 39 Classification of Elements and Periodicity in Properties questions

Newest first. Each opens with its options and the official answer.

2026 9 questions

  1. 2 Apr 2026, Shift 1 · Q59Given below are two statements : Statement (I) : The first ionisation enthalpy of the elements Na, Mg, Cl and Ar follows the order Na > Mg…MediumTwo statements
  2. 4 Apr 2026, Shift 1 · Q58A monoatomic anion (A−\mathrm{A^-}) has 4545 neutrons and 3636 electrons. Atomic mass, group in the periodic table and physical state at…EasySingle correct
  3. 4 Apr 2026, Shift 2 · Q57The 1st1^{\text{st}} ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of the 2nd2^{\text{nd}} ionization…EasySingle correct
  4. 5 Apr 2026, Shift 1 · Q58Given below are two statements: Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is F > O > N.…EasyTwo statements
  5. 5 Apr 2026, Shift 2 · Q53The covalent radii of atoms A and B are rAr_A and rBr_B, respectively. The covalent bond length and total length of AB molecule are…MediumSingle correct
  6. 5 Apr 2026, Shift 2 · Q58Given below are two statements : Statement I : The number of pairs among [Al2O3,Cr2O3]\mathrm{[Al_2O_3, Cr_2O_3]}, [Cl2O7,Mn2O7]\mathrm{[Cl_2O_7, Mn_2O_7]},…MediumTwo statements
  7. 6 Apr 2026, Shift 1 · Q71First and second ionization enthalpies of lithium are 520 kJ mol−1^{-1} and 7297 kJ mol−1^{-1} respectively. Energy required to convert…EasyNumerical value
  8. 6 Apr 2026, Shift 2 · Q58In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme right…EasySingle correct
  9. 8 Apr 2026, Shift 2 · Q58Match List - I with List - II. List - I (Electronic configuration of neutral atom (where n = 2)) | List - II (1st^{st} Ionization Energy…MediumMatch the list

2025 9 questions

  1. 2 Apr 2025, Shift 1 · Q58The property/properties that show irregularity in first four elements of group-17 is/are : (A) Covalent radius (B) Electron affinity (C)…MediumOther
  2. 2 Apr 2025, Shift 1 · Q59Given below are two statements : Statement (I) : The metallic radius of Al is less than that of Ga. Statement (II) : The ionic radius of…MediumTwo statements
  3. 2 Apr 2025, Shift 2 · Q58Electronic configuration of four elements A, B, C and D are given below : (A) 1s22s22p31s^22s^22p^3 (B) 1s22s22p41s^22s^22p^4 (C) 1s22s22p51s^22s^22p^5 (D)…EasySingle correct
  4. 3 Apr 2025, Shift 1 · Q60Which of the following statements are correct ? A. The process of adding an electron to a neutral gaseous atom is always exothermic. B.…MediumOther
  5. 3 Apr 2025, Shift 2 · Q59Match the LIST-I with LIST-II LIST-I (Family) A. Pnictogen (group 15) B. Chalcogen C. Halogen D. Noble gas LIST-II (Symbol of Element) I.…MediumMatch the list
  6. 3 Apr 2025, Shift 2 · Q60The correct orders among the following are A. Atomic radius : B < Al < Ga < In < Tl B. Electronegativity : Al < Ga < In < Tl < B C.…MediumOther
  7. 4 Apr 2025, Shift 2 · Q57The elements of Group 13 with highest and lowest first ionisation enthalpies are respectively :EasySingle correct
  8. 7 Apr 2025, Shift 2 · Q59Choose the incorrect trend in the atomic radii (r) of the elements.EasySingle correct
  9. 8 Apr 2025, Shift 2 · Q56The atomic number of the element from the following with lowest 1st^{st} ionisation enthalpy is :EasySingle correct

2024 8 questions

  1. 6 Apr 2024, Shift 2 · Q69Arrange the following elements in the increasing order of number of unpaired electrons in it. (A) Sc (B) Cr (C) V (D) Ti (E) Mn Choose the…EasyOther
  2. 8 Apr 2024, Shift 1 · Q68Match List I with List II LIST I (Elements): A. Cl, S; B. Ge, As; C. Fr, Ra; D. F, O LIST II (Properties in their respective groups): I.…MediumMatch the list
  3. 9 Apr 2024, Shift 2 · Q67Match List I with List II List I (Element) | List II (Electronic Configuration) A. N | I. [Ar] 3d10 4s2 4p5[\mathrm{Ar}]\,3d^{10}\,4s^2\,4p^5 B. S | II.…EasyMatch the list
  4. 9 Apr 2024, Shift 2 · Q68Match List I with List II List I | List II A. Melting Point [K] | I. Tl>In>Ga>Al>B\mathrm{Tl>In>Ga>Al>B} B. Ionic Radius [M+3\mathrm{M^{+3}}/pm] | II.…HardMatch the list
  5. 29 Jan 2024, Shift 1 · Q64Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The first ionisation…EasyAssertion–reason
  6. 30 Jan 2024, Shift 2 · Q66Given below are two statements: Statement - I: Along the period, the chemical reactivity of the elements gradually increases from group 1…EasyTwo statements
  7. 31 Jan 2024, Shift 1 · Q66The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D. S Choose the most appropriate from the…MediumOther
  8. 31 Jan 2024, Shift 2 · Q66Consider the following elements. Group ↓\downarrow A' B' →\rightarrow Period C' D' Which of the following is/are true about A', B', C'…MediumOtherHas a figure

2023 2 questions

  1. 6 Apr 2023, Shift 1 · Q64The difference between electron gain enthalpies will be maximum between:MediumSingle correct
  2. 11 Apr 2023, Shift 1 · Q64For elements B, C, N, Li, Be, O and F, the correct order of first ionization enthalpy isEasySingle correct

2022 2 questions

  1. 25 Jul 2022, Shift 1 · Q66The IUPAC nomenclature of an element with electronic configuration [Rn] 5f146d17s2[\mathrm{Rn}]\,5f^{14}6d^{1}7s^{2} is :MediumSingle correct
  2. 28 Jul 2022, Shift 1 · Q65In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ? (A) Rb and Cs (B) Na…MediumOther

2021 4 questions

  1. 25 Jul 2021, Shift 1 · Q33The ionic radii of K+\mathrm{K^+}, Na+\mathrm{Na^+}, Al3+\mathrm{Al^{3+}} and Mg2+\mathrm{Mg^{2+}} are in the order :EasySingle correct
  2. 16 Mar 2021, Shift 2 · Q33The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are :MediumSingle correct
  3. 16 Mar 2021, Shift 2 · Q36Identify the elements X and Y using the ionisation energy values given below : Ionization energy (kJ/mol) 1st 2nd X 495 4563 Y 731 1450EasySingle correct
  4. 18 Mar 2021, Shift 1 · Q34The ionic radius of Na+\mathrm{Na^+} ion is 1.02 Å. The ionic radii (in Å) of Mg2+\mathrm{Mg^{2+}} and Al3+\mathrm{Al^{3+}}, respectively, are :EasySingle correct

2020 4 questions

  1. 8 Jan 2020, Shift 1 · Q32The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :EasySingle correct
  2. 9 Jan 2020, Shift 2 · Q32The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol−1^{-1}, respectively. How many moles of HCl and…EasySingle correct
  3. 2 Sep 2020, Shift 1 · Q32In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is :EasySingle correct
  4. 6 Sep 2020, Shift 2 · Q46The atomic number of Unnilunium is ________.EasyNumerical value

2017 1 questions

  1. 2 Apr 2017 (offline) · Q45The group having isoelectronic species is :EasySingle correct

Pattern: Asked most years.