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Chemistry - Classification of Elements and Periodicity in Properties

Practise 51 NEET previous year questions on Classification of Elements and Periodicity in Properties, compiled from papers spanning 2002 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty NEET tests.

Classification of Elements and Periodicity in Properties has been asked in 21 of the 39 years of NEET papers analysed (1988–2026), with 51 questions in all. 69% of them were easy, 29% moderate and 2% tough. Most of its questions came from 2026, with 5 questions that year. In the last three years (2024–2026) it had 12 questions across 13 papers, about 0.9 per paper.

The chapter's 3 topics are not weighted equally: Periodic properties (43 questions, 84%), Modern periodic table (7 questions, 14%), and Earlier attempts of periodic classification (1 question, 2%) have been asked the most. Periodic properties has also led over the last five years, with 14 questions. Periodic properties has produced the most tough questions (1).

  1. 1The correct order of increasing metallic character of Na, Be, P, Mg and Si is :2026 (Cancelled)Periodic properties
  2. 2Identify the incorrect statement from the following :2026 (Cancelled)Periodic properties
  3. 3Among the following options, the correct trend in the electron gain enthalpy is2026 (Re-NEET)Periodic properties
  4. 4The correct statement is2026 (Re-NEET)Periodic properties
  5. 5Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R . Assertion A : The first ionization e2026 (Re-NEET)Periodic properties
  6. 6Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling 2025Periodic properties
  7. 7Which among the following electronic configurations belong to main group elements? A. B. C. D. E. Choose the correct answer from the option 2025Modern periodic table
  8. 8Arrange the following elements in increasing order of first ionization enthalpy: Choose the correct answer from the options given below:2024Periodic properties
  9. 9Arrange the following elements in increasing order of electronegativity: Choose the correct answer from the options given below:2024Periodic properties
  10. 10The correct decreasing order of atomic radii of and C is2024 (Re-NEET)Periodic properties
  11. 11Match List-I with List-II : Identify the correct answer from the options given below:2024 (Re-NEET)Modern periodic table
  12. 12Match List-I with List-II: Choose the correct answer from the options given below:2024 (Re-NEET)Modern periodic table
  13. 13Taking stability as the factor, which one of the following represent the correct relationship?2023 (All India)Periodic properties
  14. 14Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ionisation enthal2023 (Manipur)Periodic properties
  15. 15The correct sequence given below containing neutral, acidic, basic and amphoteric oxide each, respectively, is2023 (Manipur)Periodic properties
  16. 16The IUPAC name of an element with atomic number 119 is2022 (Phase 1)Modern periodic table
  17. 17If first ionization enthalpies of element and are and , respectively and second ionization enthalpies of and are 3069 and , respectively. Th2022 (Phase 2)Periodic properties
  18. 18The correct order of first ionization enthalpy for the given four element is :2022 (Phase 2)Periodic properties
  19. 19Identify the incorrect match. Name IUPAC Official Name (a) Unnilunium (i) Mendelevium (b) Unniltrium (ii) Lawrencium (c) Unnilhexium (iii) S2020 (Phase 1)Earlier attempts of periodic classification
  20. 20Match the following : Oxide Nature (a) CO (i) Basic (b) BaO (ii) Neutral (c) Al 2 O 3 (iii) Acidic (d) Cl 2 O 7 (iv) Amphoteric Which of the2020 (Phase 1)Periodic properties
  21. 21Match the element in column I with that in column II. Column-I Column-II (a) Copper (p) Non-metal (b) Fluorine (q) Transition metal (c) Sili2020 (Phase 2)Modern periodic table
  22. 22For the second period elements the correct increasing order of first ionization enthalpy is:2019 (All India)Periodic properties
  23. 23Match the oxide given in column A with its property given in column B. Which of the following options has all correct pairs?2019 (Odisha)Periodic properties
  24. 24The correct order of atomic radii in group 13 elements is2018Periodic properties
  25. 25The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?2017Modern periodic table
  26. 26In which of the following options the order of arrangement does not agree with the variation of property indicated against it?2016 (Phase 1)Periodic properties
  27. 27Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?2016 (Phase 1)Periodic properties
  28. 28The species A r , K + and C a 2 + contain the same number of electrons. In which order do their radii increase?2015 (Phase 1)Periodic properties
  29. 29The formation of the oxide ion, O 2 - ( g ) , from oxygen atom requires first an exothermic and then an endothermic step as shown in below: 2015 (Phase 2)Periodic properties
  30. 30Which of the following orders of ionic radii is correctly represented?2014Periodic properties
  31. 31Identify the correct order of solubility in aqueous medium.2013 (All India)Periodic properties
  32. 32Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for and ?2013 (Karnataka)Periodic properties
  33. 33What is the value of electron gain enthalpy of if of ?2011 (Mains)Periodic properties
  34. 34Which of the following oxide is amphoteric?2011 (Mains)Periodic properties
  35. 35Among the elements and , the order of increasing atomic radii is2010 (Mains)Periodic properties
  36. 36Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements and ?2010 (Screening)Periodic properties
  37. 37Which of the following molecules acts as a Lewis acid ?2009 (Mains)Periodic properties
  38. 38The stability of +1 oxidation state increases in the sequence :2009 (Mains)Periodic properties
  39. 39Amongst the elements with following electronic configurations, which one of them may have the highest ionisation energy ?2009 (Screening)Periodic properties
  40. 40The stability of +1 oxidation state increases in the sequence2009 (Screening)Periodic properties
  41. 41The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and is2008 (Mains)Periodic properties
  42. 42The correct order of decreasing second ionisation enthalpy of Ti(22), V (23), Cr (24) and is2008 (Screening)Periodic properties
  43. 43With which of the following electronic configuration an atom has the lowest ionisation enthalpy?2007Periodic properties
  44. 44Which of the following ionic species has the greatest proton affinity to form stable compound?2007Periodic properties
  45. 45Identify the correct order of the size of the following:2007Periodic properties
  46. 46Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic spec2005Periodic properties
  47. 47Four successive members of the first two transition elements are listed below with their atomic numbers. Which one of them is expected to ha2005Periodic properties
  48. 48Ionic radii are:2004Periodic properties
  49. 49An atom has electronic configuration , in which group it will be placed?2002Modern periodic table
  50. 50Which of the following statement is true?2002Periodic properties

Frequently Asked Questions

1.How many questions are available for Classification of Elements and Periodicity in Properties?

This chapter includes 51 questions compiled from NEET papers spanning 2002 to 2026.

2.Are these questions only from NEET, or from other exams too?

These are NEET questions specifically for the Classification of Elements and Periodicity in Properties chapter. Questions from other exams like AIIMS or JIPMER are organised separately under their respective exam sections.

3.Is Classification of Elements and Periodicity in Properties an important chapter for NEET Chemistry?

Classification of Elements and Periodicity in Properties has appeared in 21 of the 25 years of NEET papers covered here, with 51 questions across 32 papers - about 2 per paper it appears in.

4.What is the difficulty level of Classification of Elements and Periodicity in Properties questions in NEET?

Of the 51 questions analysed for this chapter, 69% are easy, 29% moderate and 2% tough. 2026 had the most, with 5 questions.

5.Which topics in Classification of Elements and Periodicity in Properties should I focus on?

These topics have carried the most weightage in Classification of Elements and Periodicity in Properties:

  • Periodic properties - 43 questions (84%)
  • Modern periodic table - 7 questions (14%)
  • Earlier attempts of periodic classification - 1 question (2%)
  • Periodic properties has produced the most tough questions (1).
6.Is Classification of Elements and Periodicity in Properties's weightage in NEET going up or down?

Across all 32 papers analysed, Classification of Elements and Periodicity in Properties has averaged about 1.6 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.