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Classification of Elements and Periodicity in Properties JENPAS MCQ & Practice Questions

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Classification of Elements and Periodicity in Properties Revision Guide for JENPAS Chemistry

Classification of Elements and Periodicity in Properties is part of JENPAS Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

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Important Topics

  • Core definitions and principles
  • Important equations or relationships
  • Common applications and examples
  • Frequently confused concepts
  • Exam-style multiple-choice questions
  • Error review and targeted revision

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Top 20 Classification of Elements and Periodicity in Properties MCQs with Answers

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JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

1. Modern periodic law relates periodic properties to. Choose the correct answer:

  • A. mass number
  • B. neutron number
  • C. atomic number
  • D. atomic mass
Answer: C
Explanation: Correct answer: atomic number. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

2. Number of periods in the modern periodic table. Choose the correct answer:

  • A. 32
  • B. 7
  • C. 18
  • D. 8
Answer: B
Explanation: Correct answer: 7. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

3. Number of groups in the modern periodic table. Choose the correct answer:

  • A. 18
  • B. 7
  • C. 8
  • D. 32
Answer: A
Explanation: Correct answer: 18. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

4. The s-block mainly comprises. Choose the correct answer:

  • A. Groups 3-12
  • B. Groups 13-18
  • C. f-block elements
  • D. Groups 1 and 2
Answer: D
Explanation: Correct answer: Groups 1 and 2. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

5. The p-block mainly comprises. Choose the correct answer:

  • A. Groups 3-12
  • B. only lanthanoids
  • C. Groups 13-18
  • D. Groups 1-2
Answer: C
Explanation: Correct answer: Groups 13-18. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

6. Transition elements belong primarily to the. Choose the correct answer:

  • A. f-block only
  • B. d-block
  • C. s-block
  • D. p-block
Answer: B
Explanation: Correct answer: d-block. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

7. Lanthanoids and actinoids are. Choose the correct answer:

  • A. inner transition elements
  • B. halogens
  • C. alkali metals
  • D. noble gases
Answer: A
Explanation: Correct answer: inner transition elements. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

8. Group 1 valence configuration is. Choose the correct answer:

  • A. ns2
  • B. ns2np1
  • C. ns2np5
  • D. ns1
Answer: D
Explanation: Correct answer: ns1. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

9. Group 2 valence configuration is. Choose the correct answer:

  • A. ns2np2
  • B. ns2np6
  • C. ns2
  • D. ns1
Answer: C
Explanation: Correct answer: ns2. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

10. Group 17 valence configuration is. Choose the correct answer:

  • A. ns1
  • B. ns2np5
  • C. ns2np4
  • D. ns2np6
Answer: B
Explanation: Correct answer: ns2np5. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

11. Across a period effective nuclear charge generally. Choose the correct answer:

  • A. increases
  • B. decreases
  • C. remains constant
  • D. becomes zero
Answer: A
Explanation: Correct answer: increases. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

12. Across a period atomic radius generally. Choose the correct answer:

  • A. increases
  • B. remains constant
  • C. doubles
  • D. decreases
Answer: D
Explanation: Correct answer: decreases. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

13. Down a group atomic radius generally. Choose the correct answer:

  • A. remains constant
  • B. becomes zero
  • C. increases
  • D. decreases
Answer: C
Explanation: Correct answer: increases. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

14. Largest atomic radius among Li, Na, K and Rb. Choose the correct answer:

  • A. Li
  • B. Rb
  • C. K
  • D. Na
Answer: B
Explanation: Correct answer: Rb. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

15. Largest atomic radius among Na, Mg, Al and Si. Choose the correct answer:

  • A. Na
  • B. Mg
  • C. Al
  • D. Si
Answer: A
Explanation: Correct answer: Na. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

16. A cation compared with its parent atom is generally. Choose the correct answer:

  • A. larger
  • B. equal in size
  • C. always twice as large
  • D. smaller
Answer: D
Explanation: Correct answer: smaller. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

17. An anion compared with its parent atom is generally. Choose the correct answer:

  • A. equal in size
  • B. always half as large
  • C. larger
  • D. smaller
Answer: C
Explanation: Correct answer: larger. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

18. Smallest species among isoelectronic O2-, F-, Na+, Mg2+. Choose the correct answer:

  • A. O2-
  • B. Mg2+
  • C. Na+
  • D. F-
Answer: B
Explanation: Correct answer: Mg2+. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

19. Largest species among isoelectronic O2-, F-, Na+, Mg2+. Choose the correct answer:

  • A. O2-
  • B. F-
  • C. Na+
  • D. Mg2+
Answer: A
Explanation: Correct answer: O2-. This follows from standard periodic classification and periodic-property trends.

JENPAS Chemistry · Classification of Elements and Periodicity in Properties · Very Very Hard

20. Across a period first ionisation enthalpy generally. Choose the correct answer:

  • A. decreases
  • B. remains constant
  • C. becomes negative
  • D. increases
Answer: D
Explanation: Correct answer: increases. This follows from standard periodic classification and periodic-property trends.

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Classification of Elements and Periodicity in Properties Frequently Asked Questions

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