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

2 / 30

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

3 / 30

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

4 / 30

4. What is the general trend of atomic radius across a period in the periodic table?

5 / 30

5. Why does oxygen have less negative electron gain enthalpy than sulfur?

6 / 30

6. Which of the following best defines metallic radius?

7 / 30

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

8 / 30

8. What is meant by valency of an element?

9 / 30

9. What was the greatest achievement of Mendeleev’s periodic table?

10 / 30

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

11 / 30

11. Which property is common among all metals?

12 / 30

12. Approximately how many naturally occurring elements are known today?

13 / 30

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

14 / 30

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

15 / 30

15. What are the two common oxidation states of copper?

16 / 30

16. Which element is known as the "bridge element" between s-block and p-block?

17 / 30

17. Which of the following is a metalloid?

18 / 30

18. Which of the following elements is NOT a metalloid?

19 / 30

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

20 / 30

20. Which was a major limitation of grouping elements only by similar properties?

21 / 30

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

22 / 30

22. Which gas is essential for combustion and respiration?

23 / 30

23. Which element has the highest electronegativity on the Pauling scale?

24 / 30

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

25 / 30

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

26 / 30

26. Which group is known as the halogens?

27 / 30

27. What is electronegativity?

28 / 30

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

29 / 30

29. Which superheavy element was named after the American state Tennessee?

30 / 30

30. Why was Döbereiner’s Triad rule not universally applicable?

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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. In p-block elements, how is the group number related to valence electrons?

2 / 50

2. The configuration belongs to which block?

3 / 50

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

4 / 50

4. Which gas is essential for combustion and respiration?

5 / 50

5. Which property is common among all metals?

6 / 50

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

7 / 50

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

8 / 50

8. Which property was completely ignored in random classifications?

9 / 50

9. Why can’t second-period elements expand their octet?

10 / 50

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

11 / 50

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

12 / 50

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

13 / 50

13. How many elements are present in the second period of the periodic table?

14 / 50

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

15 / 50

15. In which year did Döbereiner propose his Triad law?

16 / 50

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

17 / 50

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

18 / 50

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

19 / 50

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

20 / 50

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

21 / 50

21. Why is oxygen able to form multiple bonds while sulfur prefers single bonds?

22 / 50

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

23 / 50

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

24 / 50

24. What is the most abundant element in the universe?

25 / 50

25. What happens to ionic radius when an atom forms a cation?

26 / 50

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

27 / 50

27. Why does beryllium behave differently from other alkaline earth metals?

28 / 50

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

29 / 50

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

30 / 50

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

31 / 50

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

32 / 50

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

33 / 50

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

34 / 50

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

35 / 50

35. Which element shows a sudden jump between first and second ionization enthalpies?

36 / 50

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

37 / 50

37. Why do noble gases have positive electron gain enthalpies?

38 / 50

38. Which group contains the alkaline earth metals?

39 / 50

39. Which statement about d-block elements is correct?

40 / 50

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

41 / 50

41. What is the general rule for writing symbols in IUPAC temporary names?

42 / 50

42. Which of the following is true about groups in the periodic table?

43 / 50

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

44 / 50

44. By the mid-19th century, approximately how many elements had been discovered?

45 / 50

45. What is the usual valency of oxygen?

46 / 50

46. What was the greatest achievement of Mendeleev’s periodic table?

47 / 50

47. Which of the following elements has the lowest electronegativity?

48 / 50

48. Which gas forms about 21% of Earth’s atmosphere?

49 / 50

49. Who gave the modern periodic law?

50 / 50

50. Which element has the most negative electron gain enthalpy?

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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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