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Class 11 Chemistry — Chapter 3: Classification of Elements and Periodicity in Properties Online Test

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Class 11 Chemistry: Classification of Elements and Periodicity in Properties Online Test (Paper 1)

Welcome to Paper 1! This is your foundation to build confidence and get you ready to tackle the challenges ahead.

  • Total Questions: 20
  • Time Allotted: 30 minutes
  • Passing Score: 40%
  • Randomization: No
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

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1 / 20

1. Which property is not periodic in nature?

2 / 20

2. What is meant by the diagonal relationship in the periodic table?

3 / 20

3. What is meant by valency of an element?

4 / 20

4. Which of the following best explains why halogens have highly negative first electron gain enthalpies?

5 / 20

5. Why is Al³⁺ smaller than Na⁺ though both are cations?

6 / 20

6. Which factor most strongly influences covalent radius across a period?

7 / 20

7. Identify the block for the configuration .

8 / 20

8. What is the root word for digit 2 in the IUPAC naming system?

9 / 20

9. Which group contains the alkaline earth metals?

10 / 20

10. Which group of elements was not included in Mendeleev’s original periodic table?

11 / 20

11. Which major drawback arose when elements were grouped only as metals and non-metals?

12 / 20

12. Which block contains the inner transition elements?

13 / 20

13. How did Moseley experimentally determine atomic number?

14 / 20

14. During which period of history did the number of known elements grow rapidly due to improved experimental techniques?

15 / 20

15. Why was the position of hydrogen a limitation in Mendeleev’s table?

16 / 20

16. Which of the following elements shows the smallest covalent radius?

17 / 20

17. Which of the following factors does NOT affect electron gain enthalpy?

18 / 20

18. Which element shows +2 and +3 oxidation states, with +3 being more stable?

19 / 20

19. For p-block elements, how is group number related to valency?

20 / 20

20. What is the general trend of electron gain enthalpy down a group?

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Class 11 Chemistry: Classification of Elements and Periodicity in Properties Online Test (Paper 2)

Welcome to Paper 2! You’ve mastered the basics, and now it’s time to test your understanding with a more challenging set of questions.

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  • Total Questions: 30
  • Time Allotted: 45 minutes
  • Passing Score: 50%
  • Randomization: Yes
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 30

1. Why does lithium show different chemistry compared to other alkali metals?

2 / 30

2. Which element is an exception, often showing both metallic and non-metallic behavior?

3 / 30

3. Why do second-period elements often show anomalous properties compared to heavier congeners?

4 / 30

4. Why was the position of hydrogen a limitation in Mendeleev’s table?

5 / 30

5. Which has a smaller radius: Mg²⁺ or Na⁺?

6 / 30

6. How did Mendeleev’s table help in unifying elements?

7 / 30

7. According to IUPAC rules, what is the root word for digit 9 in naming superheavy elements?

8 / 30

8. Which of the following elements has a valency equal to 3?

9 / 30

9. Which of the following factors does NOT affect ionization enthalpy?

10 / 30

10. What is the electronegativity value of fluorine on the Pauling scale?

11 / 30

11. What was the problem with classifying elements only based on physical states?

12 / 30

12. What is meant by the second electron gain enthalpy?

13 / 30

13. Which of the following is an example of misplacement in random classification?

14 / 30

14. What is the second electron gain enthalpy of oxygen?

15 / 30

15. Which is a limitation of the Pauling scale?

16 / 30

16. In an isoelectronic series, which factor is most important in determining size?

17 / 30

17. How is the valency of Group 1 elements related to their group number?

18 / 30

18. How many groups are present in the modern periodic table?

19 / 30

19. Which group of elements was historically called "halogens" due to similar salt-forming properties?

20 / 30

20. Arrange the following in decreasing order of electron gain enthalpy: Cl, F, Br, I.

21 / 30

21. What is the root for digit 4 in the IUPAC system?

22 / 30

22. Which of the following pairs best demonstrates Newlands’ Octaves?

23 / 30

23. The maximum number of elements present in the 6th period of the periodic table is:

24 / 30

24. Which of the following explains why cations are smaller than anions?

25 / 30

25. What does the Modern Periodic Law state?

26 / 30

26. Why could random classification not help in predicting new elements?

27 / 30

27. Which statement about helium’s “block” and “group placement” is correct?

28 / 30

28. What is the correct order of discovery in classification of elements?

29 / 30

29. Why is the second ionization enthalpy of sodium extremely high compared to the first?

30 / 30

30. Why is hydrogen sometimes placed in Group 1?

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Class 11 Chemistry: Classification of Elements and Periodicity in Properties Online Test (Paper 3)

Welcome to Paper 3! You’ve warmed up—now it's time to step up your game and conquer the challenge with tougher questions!

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Get new questions with every attempt

  • Total Questions: 50
  • Time Allotted: 75 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 50

1. Which is a limitation of the Pauling scale?

2 / 50

2. Which element has a higher ionization enthalpy: Be or B?

3 / 50

3. Which group is called the alkali metals?

4 / 50

4. What is the periodic trend of metallic character across a period?

5 / 50

5. Which element has the largest atomic radius in Group 1 (alkali metals)?

6 / 50

6. What is the correct order of discovery in classification of elements?

7 / 50

7. Which element was temporarily named *Ununbium (Uub)*?

8 / 50

8. Which is smaller in size: F⁻ or Na⁺?

9 / 50

9. Which is a similarity between Be and Al compounds?

10 / 50

10. What is the official name of element 114?

11 / 50

11. Which of the following factors does NOT affect ionization enthalpy?

12 / 50

12. What is common to all elements in a particular period?

13 / 50

13. Why does atomic radius decrease across a period?

14 / 50

14. What did Mendeleev’s Periodic Law state?

15 / 50

15. Why does lithium carbonate decompose easily compared to sodium carbonate?

16 / 50

16. What is the general trend of electron gain enthalpy down a group?

17 / 50

17. Why is the radius of a cation always smaller than its parent atom?

18 / 50

18. What is the root word for digit 2 in the IUPAC naming system?

19 / 50

19. The maximum number of elements present in the 6th period of the periodic table is:

20 / 50

20. Which group is also known as the chalcogens or oxygen family?

21 / 50

21. What is meant by the first electron gain enthalpy of an element?

22 / 50

22. What does the IUPAC name *Unnilquadium (Unq)* represent?

23 / 50

23. What was the official name given to element 116, earlier called *Ununhexium (Uuh)*?

24 / 50

24. When was the Modern Periodic Table adopted in its long-form version?

25 / 50

25. Which of the following is a metalloid?

26 / 50

26. Which unusual step did Mendeleev take to keep elements with similar properties together?

27 / 50

27. Why is the second ionization enthalpy of sodium extremely high compared to the first?

28 / 50

28. In an isoelectronic series (same number of electrons), how does ionic radius vary?

29 / 50

29. Why was classification based only on metals and non-metals insufficient?

30 / 50

30. Which of the following dissimilar elements were forced into the same column by Newlands?

31 / 50

31. Why was the position of hydrogen a limitation in Mendeleev’s table?

32 / 50

32. What is meant by ionization enthalpy?

33 / 50

33. Why did the discovery of noble gases create a problem for Mendeleev’s table initially?

34 / 50

34. Arrange the following species in decreasing order of radius: Na, Na⁺, Cl, Cl⁻.

35 / 50

35. What is the maximum number of elements that can appear consecutively in the s-block within any period?

36 / 50

36. The horizontal rows in the modern periodic table are called:

37 / 50

37. Which statement best summarizes the significance of the Modern Periodic Law?

38 / 50

38. Why does lithium resemble magnesium more than sodium?

39 / 50

39. In an isoelectronic series, what is the general trend of ionic radius?

40 / 50

40. Which statement correctly compares Pauling and Mulliken scales?

41 / 50

41. Which period is considered the shortest in the periodic table?

42 / 50

42. Which of the following is a unique property of lithium compared to other alkali metals?

43 / 50

43. Which ion among Al³⁺, Mg²⁺, and Na⁺ has the smallest size?

44 / 50

44. What is the symbol of the element named after Yuri Oganessian?

45 / 50

45. Which superheavy element is named after Japan?

46 / 50

46. Which of the following factors does NOT affect electron gain enthalpy?

47 / 50

47. How did Moseley experimentally determine atomic number?

48 / 50

48. Which superheavy element has the official name *Roentgenium*?

49 / 50

49. The configuration belongs to which block?

50 / 50

50. According to IUPAC rules, what is the root word for digit 9 in naming superheavy elements?

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Practice Classification of Elements and Periodicity in Properties MCQs
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Class 11 Chemistry — Chapter 3: Classification of Elements and Periodicity in Properties Online Test

The Class 11 Chemistry: Chapter 3 – Classification of Elements and Periodicity in Properties Online Test gives you a real exam feel with chapter-focused MCQs. You will answer timed questions, see your result instantly, review answers, and—if you pass Paper 3—download a certificate. This test is free, CBSE/NCERT-aligned, and allows unlimited attempts. It works like a quick chapter-wise mock test / quiz for fast revision of the periodic table and periodic trends.

Confused about modern periodic table, periodic trends or periodic properties? Don’t worry. This page is your safe practice space for Chapter 3. Think of it as a small online mock test you can take at home on your phone or laptop. Each attempt is a short online exam with objective questions. You simply start a paper, answer MCQs, see your score, and read the explanations. With every attempt you’ll understand the periodic table better. When you’re ready, go for Paper 3 and earn a certificate. One small step today, stronger Chemistry tomorrow.

What is this Class 11 Chemistry: Classification of Elements and Periodicity in Properties Online Test?

This page contains three exam-style MCQ papers for Chapter 3:

  • Paper 1 (Easy) — Foundation: 20 questions · 30 min · Pass 40% · Fixed set
  • Paper 2 (Medium) — Mixed: 30 questions · 45 min · Pass 50% · Randomized from a pool of 375 Questions.
  • Paper 3 (Hard) — Challenge: 50 questions · 75 min · Pass 70% · Randomized from the same pool + Certificate on pass

Note: You get new question mixes in Paper 2 and Paper 3 on every attempt. Each attempt is timed, auto-evaluated, and shows your score with answer review.

Topics covered in these online tests

These online tests are based on NCERT Class 11 Chemistry Chapter 3 and cover the full range of sub-topics. You will practice questions from:

  • Genesis of periodic classification — Dobereiner’s triads, Newlands’ law of octaves, Mendeleev’s periodic table
  • Modern periodic law and the long form of periodic table
  • Electronic configuration and periodic table — periods, groups, blocks (s, p, d, f)
  • Nomenclature of elements (including elements with Z > 100, IUPAC rules – basic idea)
  • Periodic trends in atomic properties — atomic radius, ionic radius, covalent radius, van der Waals radius
  • Ionization enthalpy — trends in periods and groups, factors affecting IE
  • Electron gain enthalpy — general trends, irregularities, halogens vs noble gases
  • Electronegativity — concept and trends (Pauling scale, basic comparisons)
  • Valence and valency — relation with electronic configuration
  • Anomalous behaviour of second period elements and diagonal relationship
  • Periodic trends in chemical reactivity of s- and p-block elements

For more detailed step-by-step practice, you can also try: Classification of Elements and Periodicity in Properties MCQs and the full Class 11 Chemistry MCQ Question Bank.

How This Exam-Style Online Test Works

Short version: Pick a paper → answer MCQs within time → submit → get instant score and review. Pass Paper 3 to get a certificate.

What you’ll see during the test

  • MCQs: One question with four options (A, B, C, D).
  • Timer on top: P1: 30 min • P2: 45 min • P3: 75 min.
  • Pagination: Typically 10 questions per page (move to next group using page controls).
  • Navigation: Use Next/Prev buttons or question map to revisit before submitting.
  • View Result: Click View Result to see marks and detailed summary.
  • Result page shows: score %, correct / incorrect / unanswered count, answer-key/review, and share options.
  • Restart: Click Restart Test to try again with a new mix of questions (P2 & P3).

Note: Please share your feedback on the result page after completing a test.

Marking & pass criteria

  • Scoring: +1 for correct, 0 for incorrect (no negative marking).
  • Passing marks: Paper 1 — 40% • Paper 2 — 50% • Paper 3 — 70%.
  • Randomization: Paper 2 & 3 shuffle questions from a large Chapter 3 question pool on every attempt; Paper 1 stays fixed.

Who can take this test?

  • CBSE Class 11 students revising Chapter 3 (Classification of Elements and Periodicity in Properties).
  • Class 12 bridge / revision learners who want to fix periodic table basics.
  • JEE/NEET foundation aspirants building strong command over periodic trends and periodic properties.
  • Teachers / tutors needing ready-made chapter tests for assignments and quizzes.
  • Students from other boards & countries who want extra practice on periodic trends.
  • Competitive exam aspirants revising core periodic table concepts through MCQs.

Advantages of this online test

  • Real exam feel: timer, pass %, and auto-submit on time out.
  • Instant feedback: get your score, see correct answers, and spot weak areas immediately.
  • Step-up difficulty: Easy → Mixed → Challenge (+ certificate on Paper 3).
  • Unlimited attempts: practice till perfect; fresh randomized sets in Paper 2 & 3.
  • Zero cost & safe: completely free; no payment, no signup required.

How this test helps you study better

Use this simple plan for Chapter 3:

  • Step 1 – Concept check: Attempt Paper 1 after studying the chapter. Note weak sub-topics (e.g. IE trends, EGE, diagonal relationship).
  • Step 2 – Reinforce: Attempt Paper 2 (randomized) to stabilise accuracy in periodic trends and table concepts.
  • Step 3 – Exam readiness: Attempt Paper 3 strictly within time. Target ≥ 70% and earn the certificate.
  • Step 4 – Review: Read solutions carefully, maintain a small error-log notebook, revise only missed ideas.
  • Step 5 – Retake smartly: Re-attempt after 1–2 days to test long-term recall and real improvement.

Important notes (read before you start)

  • Do not refresh / close the tab during the test.
  • Best experience: latest Chrome/Edge, stable internet, distraction-free screen.
  • Allow cookies / local storage so your progress and settings work smoothly.
  • Safety: This test is 100% FREE. Ignore any payment or login requests.

More practice for Class 11 Chemistry

After finishing this online test, strengthen your Chemistry further: visit the full Class 11 Chemistry Online Test Index or practice all chapters from the Class 11 Chemistry MCQ Collection.

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