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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. The general valence shell configuration of Group 2 elements is:

2 / 30

2. For d-block elements, how is the group number determined?

3 / 30

3. What is the valency of Group 17 elements?

4 / 30

4. Which was the first element discovered in the 20th century?

5 / 30

5. Which element shows a sudden jump between second and third ionization enthalpies?

6 / 30

6. Which of the following best describes metalloids?

7 / 30

7. What was the main idea behind Döbereiner’s Triads?

8 / 30

8. Which element is considered the lightest metal?

9 / 30

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

10 / 30

10. Which period contains the actinides?

11 / 30

11. Which of the following best defines metallic radius?

12 / 30

12. Why is BeCl₂ covalent while MgCl₂ is ionic?

13 / 30

13. Which of the following factors makes electron gain enthalpy more negative?

14 / 30

14. Which of the following is an advantage of the Mulliken scale over Pauling’s scale?

15 / 30

15. Which digit is represented by the root “enn”?

16 / 30

16. Which scientist in 1789 attempted one of the earliest classifications of 33 elements into metals and non-metals?

17 / 30

17. Why was Mendeleev’s law eventually modified?

18 / 30

18. What is the general trend of ionization enthalpy down a group?

19 / 30

19. What defines the “block” of an element in the periodic table?

20 / 30

20. Which group is called the alkali metals?

21 / 30

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

22 / 30

22. Which of the following elements has the highest first ionization enthalpy?

23 / 30

23. Successive ionization enthalpies provide evidence for:

24 / 30

24. How many groups and periods were present in Mendeleev’s original table?

25 / 30

25. Which element has the smallest atomic radius in Period 2?

26 / 30

26. In the isoelectronic series C⁴⁻, N³⁻, O²⁻, F⁻, which species has the smallest radius?

27 / 30

27. Which statement correctly distinguishes “d-block” from “transition element” in IUPAC terms?

28 / 30

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

29 / 30

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

30 / 30

30. Why is the second ionization enthalpy always greater than the first?

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

Good luck! 👍

1 / 50

1. Why is the electron gain enthalpy of fluorine less negative than chlorine?

2 / 50

2. What is the relation between metallic radius and covalent radius for the same element?

3 / 50

3. Why is hydrogen sometimes placed in Group 1?

4 / 50

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

5 / 50

5. What is the valency of Group 1 elements?

6 / 50

6. Which period contains the lanthanides?

7 / 50

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

8 / 50

8. How many elements did Newlands arrange while proposing his Law of Octaves?

9 / 50

9. How many groups and periods were present in Mendeleev’s original table?

10 / 50

10. What is the maximum valency shown by sulfur?

11 / 50

11. What is meant by successive ionization enthalpies?

12 / 50

12. What is the usual valency of oxygen?

13 / 50

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

14 / 50

14. Which factor lowers ionization enthalpy down a group?

15 / 50

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

16 / 50

16. Which digit corresponds to the IUPAC root “sept”?

17 / 50

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

18 / 50

18. What defines the “block” of an element in the periodic table?

19 / 50

19. What is the general trend of ionization enthalpy down a group?

20 / 50

20. Arrange in increasing order of radius: S²⁻, Cl⁻, K⁺, Ca²⁺.

21 / 50

21. What was the main idea behind Döbereiner’s Triads?

22 / 50

22. Which element was named after the scientist Nicolaus Copernicus?

23 / 50

23. Why is the position of hydrogen unique in the periodic table?

24 / 50

24. Who introduced the most widely used scale of electronegativity?

25 / 50

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

26 / 50

26. Which element has the maximum electronegativity in the periodic table?

27 / 50

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

28 / 50

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

29 / 50

29. Which element was formerly called *Ununhexium (Uuh)*?

30 / 50

30. Which group is known as the halogens?

31 / 50

31. Why does beryllium form covalent compounds instead of ionic ones like other Group 2 metals?

32 / 50

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

33 / 50

33. What was the major contribution of Döbereiner’s Triads?

34 / 50

34. Which digit is represented by the root “pent”?

35 / 50

35. Which of the following elements most commonly exhibits variable valency?

36 / 50

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

37 / 50

37. Which limitation of Newlands’ Octaves showed its inadequacy?

38 / 50

38. Which of the following pairs represents a non-metal and a metalloid, respectively?

39 / 50

39. Which important scientific principle was missing from random classification?

40 / 50

40. Which group contains the most reactive non-metals?

41 / 50

41. Why is BeCl₂ covalent while MgCl₂ is ionic?

42 / 50

42. What is the first electron gain enthalpy of oxygen?

43 / 50

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

44 / 50

44. Which group contains elements that exist as diatomic non-metal molecules under normal conditions?

45 / 50

45. What is meant by the covalent radius of an atom?

46 / 50

46. Why was random classification of elements considered unsatisfactory?

47 / 50

47. What is the official name of element 114?

48 / 50

48. Which period contains the actinides?

49 / 50

49. Which gas is placed in Group 18 but has an electronic configuration similar to Group 2?

50 / 50

50. Successive ionization enthalpies provide evidence for:

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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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