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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. How did Moseley experimentally determine atomic number?

2 / 30

2. What is the general valency of Group 2 elements?

3 / 30

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

4 / 30

4. Successive ionization enthalpies provide evidence for:

5 / 30

5. Why does lithium resemble magnesium more than sodium?

6 / 30

6. What is meant by electron gain enthalpy?

7 / 30

7. Which property distinguishes beryllium hydroxide from other Group 2 hydroxides?

8 / 30

8. By the early 19th century, about how many elements were known to chemists?

9 / 30

9. Who gave the Modern Periodic Law in 1913?

10 / 30

10. How many elements are present in the 4th period of the periodic table?

11 / 30

11. Which common property groups halogens together?

12 / 30

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

13 / 30

13. Which oxidation states are commonly shown by tin (Sn)?

14 / 30

14. Which groups are known as the representative or main group elements?

15 / 30

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

16 / 30

16. What is the root for digit 8 in IUPAC naming rules?

17 / 30

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

18 / 30

18. Which was the simplest way of grouping elements in early classifications?

19 / 30

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

20 / 30

20. Which property is shared by boron and silicon due to diagonal relationship?

21 / 30

21. Which element has the lowest first ionization enthalpy among the following?

22 / 30

22. Which anomaly of Mendeleev’s table was corrected by the Modern Periodic Law?

23 / 30

23. Which group numbers correspond to the s-block?

24 / 30

24. Which element has the most negative electron gain enthalpy among the following?

25 / 30

25. Why are noble gases called "inert gases"?

26 / 30

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

27 / 30

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

28 / 30

28. According to Pauling, electronegativity difference () between two atoms is related to which measurable property?

29 / 30

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

30 / 30

30. Which block elements typically have the lowest ionization enthalpies in their respective periods and form strongly basic oxides/hydroxides?

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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 factor most strongly influences covalent radius across a period?

2 / 50

2. Which property was completely ignored in random classifications?

3 / 50

3. Which of the following is a metalloid?

4 / 50

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

5 / 50

5. Which of the following pairs is an isoelectronic series?

6 / 50

6. Which digit is represented by the root word “un” in IUPAC naming?

7 / 50

7. Which major limitation was exposed in Mendeleev’s periodic law?

8 / 50

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

9 / 50

9. Which of the following has a positive first electron gain enthalpy?

10 / 50

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

11 / 50

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

12 / 50

12. Which is a unique property of second-period elements not observed in heavier congeners?

13 / 50

13. Which property is common to both Be and Al due to diagonal relationship?

14 / 50

14. Why does atomic radius decrease across a period?

15 / 50

15. How many periods are present in the long form of the modern periodic table?

16 / 50

16. What is electronegativity?

17 / 50

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

18 / 50

18. Which one among the following has the largest radius?

19 / 50

19. Why does boron show chemistry very different from aluminum?

20 / 50

20. What was one of the major achievements of Mendeleev’s table?

21 / 50

21. Which groups are known as the representative or main group elements?

22 / 50

22. Who gave the Modern Periodic Law in 1913?

23 / 50

23. Why do noble gases have almost zero electronegativity values?

24 / 50

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

25 / 50

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

26 / 50

26. Which set of elements was grouped together due to noble gas inertness?

27 / 50

27. Which of the following is a disadvantage (con) of the Modern Periodic Law?

28 / 50

28. The f-block elements (inner transition elements) consist of:

29 / 50

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

30 / 50

30. Why is the radius of an anion always larger than its parent atom?

31 / 50

31. Which property was mostly used by early chemists to group elements?

32 / 50

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

33 / 50

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

34 / 50

34. Which of the following is NOT a property of non-metals?

35 / 50

35. Which of the following pairs shows an exception to the general periodic trend in ionization enthalpy?

36 / 50

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

37 / 50

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

38 / 50

38. Which property is not periodic in nature?

39 / 50

39. Why was the IUPAC system of naming elements beyond atomic number 100 introduced?

40 / 50

40. Mulliken’s electronegativity values are usually converted into Pauling’s scale by:

41 / 50

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

42 / 50

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

43 / 50

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

44 / 50

44. How did Mendeleev classify hydrogen?

45 / 50

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

46 / 50

46. What is meant by valency of an element?

47 / 50

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

48 / 50

48. Which has the largest radius among the following: O²⁻, F⁻, Na⁺, Mg²⁺?

49 / 50

49. What happens to ionic radius when an atom forms an anion?

50 / 50

50. Which property is common among all metals?

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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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