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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

Good luck! 👍

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 scientist first grouped elements into metals and non-metals?

2 / 30

2. Why does the diagonal relationship exist in the periodic table?

3 / 30

3. Why is the van der Waals radius larger than the covalent radius?

4 / 30

4. Which groups are called transition elements?

5 / 30

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

6 / 30

6. Compare the size of Cl (neutral atom) and Cl⁻ (anion).

7 / 30

7. Which feature of Mendeleev’s periodic table allowed noble gases to be easily accommodated after their discovery?

8 / 30

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

9 / 30

9. The electronic configuration of an element is [Kr] 4d¹⁰5s²5p⁵. To which group does it belong?

10 / 30

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

11 / 30

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

12 / 30

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

13 / 30

13. Which block elements are called transition elements?

14 / 30

14. What is meant by valency of an element?

15 / 30

15. Which period contains the actinides?

16 / 30

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

17 / 30

17. Why was Newlands’ Law of Octaves criticized?

18 / 30

18. What is the general trend of atomic radius down a group?

19 / 30

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

20 / 30

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

21 / 30

21. Which is a limitation of the Pauling scale?

22 / 30

22. Which element shows variable valencies of +2 and +4?

23 / 30

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

24 / 30

24. Which period in the periodic table is the longest?

25 / 30

25. What is the temporary IUPAC name for element with atomic number 118?

26 / 30

26. Which pair shows diagonal similarity in forming covalent halides?

27 / 30

27. Which group is known as the noble gases?

28 / 30

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

29 / 30

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

30 / 30

30. Which of the following is the official name of element 113?

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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 of the following elements most commonly exhibits variable valency?

2 / 50

2. Arrange the species O²⁻, F⁻, Na⁺, Mg²⁺ in order of increasing radius.

3 / 50

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

4 / 50

4. Which pair of elements shows diagonal relationship in the periodic table?

5 / 50

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

6 / 50

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

7 / 50

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

8 / 50

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

9 / 50

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

10 / 50

10. Why did classification purely on valency fail?

11 / 50

11. Which oxidation states are commonly shown by manganese?

12 / 50

12. Which property shows similarity between B and Si?

13 / 50

13. Why is fluorine the strongest oxidizing agent among the halogens?

14 / 50

14. Which group is called the alkali metals?

15 / 50

15. Which element was once called *Ununseptium (Uus)*?

16 / 50

16. What is the general trend of electronegativity across a period?

17 / 50

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

18 / 50

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

19 / 50

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

20 / 50

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

21 / 50

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

22 / 50

22. Who is credited with introducing the concept of “atomic number” as the basis for classification?

23 / 50

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

24 / 50

24. How many triads were originally proposed by Döbereiner?

25 / 50

25. Which group has the least negative electron gain enthalpy values?

26 / 50

26. Why is the ionization enthalpy of oxygen lower than that of nitrogen, despite oxygen’s higher nuclear charge?

27 / 50

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

28 / 50

28. What is the general trend of electron gain enthalpy across a period?

29 / 50

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

30 / 50

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

31 / 50

31. Which superheavy element is named after a Russian region?

32 / 50

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

33 / 50

33. According to IUPAC nomenclature, which root word represents the digit 0?

34 / 50

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

35 / 50

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

36 / 50

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

37 / 50

37. What was the basis of Mendeleev’s periodic table?

38 / 50

38. Which element was named *Meitnerium (Mt)* in honor of physicist Lise Meitner?

39 / 50

39. Why is the second electron gain enthalpy always positive?

40 / 50

40. Which property best explains the gradual change from metallic to non-metallic behavior across a period?

41 / 50

41. Identify the block for the configuration .

42 / 50

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

43 / 50

43. Why does the diagonal relationship exist in the periodic table?

44 / 50

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

45 / 50

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

46 / 50

46. Why are lanthanides and actinides placed separately at the bottom of the periodic table?

47 / 50

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

48 / 50

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

49 / 50

49. Why is the first electron gain enthalpy of most non-metals negative?

50 / 50

50. Why is atomic number considered more fundamental than atomic mass?

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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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