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Periodic Properties and Variations of Properties ICSE Class 10 MCQ & Practice Questions

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Periodic Properties and Variations of Properties Revision Guide for ICSE Class 10 Chemistry

Periodic Properties and Variations of Properties is part of ICSE Class 10 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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What to practise in Periodic Properties and Variations of Properties

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Top 20 Periodic Properties and Variations of Properties MCQs with Answers

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ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

1. The modern periodic law is based on:

  • A. Atomic mass
  • B. Atomic number
  • C. Mass number
  • D. Neutron number
Answer: B
Explanation: Modern periodicity depends on atomic number.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

2. An element with configuration 2,8,7 belongs to:

  • A. Group 1
  • B. Group 2
  • C. Group 17
  • D. Group 18
Answer: C
Explanation: Seven valence electrons indicate Group 17.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

3. An atom with three occupied shells belongs to:

  • A. Period 2
  • B. Period 3
  • C. Period 4
  • D. Group 3
Answer: B
Explanation: Period number equals occupied shells.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

4. Across a period, atomic radius generally:

  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Doubles
Answer: B
Explanation: Effective nuclear charge increases across a period.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

5. Down a group, atomic radius generally:

  • A. Decreases
  • B. Increases
  • C. Remains fixed
  • D. Becomes zero
Answer: B
Explanation: New shells are added down a group.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

6. First ionisation potential generally increases across a period because:

  • A. Atomic size increases
  • B. Effective nuclear charge increases
  • C. Shielding dominates
  • D. A new shell is added
Answer: B
Explanation: Outer electrons are held more strongly.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

7. First ionisation potential generally decreases down a group because:

  • A. Atomic size and shielding increase
  • B. Nuclear charge becomes zero
  • C. Atomic size decreases
  • D. Electronegativity increases
Answer: A
Explanation: Distance and shielding weaken nuclear attraction.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

8. The most electronegative element is:

  • A. Oxygen
  • B. Chlorine
  • C. Fluorine
  • D. Nitrogen
Answer: C
Explanation: Fluorine is the most electronegative element.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

9. Across a period, electronegativity generally:

  • A. Decreases
  • B. Remains fixed
  • C. Increases
  • D. Becomes zero
Answer: C
Explanation: Effective nuclear charge increases.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

10. Down a group, electronegativity generally:

  • A. Increases
  • B. Decreases
  • C. Remains fixed
  • D. Doubles
Answer: B
Explanation: Atomic size and shielding increase.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

11. Metallic character generally decreases across a period because:

  • A. Ionisation potential rises
  • B. Atomic radius rises
  • C. Shielding dominates
  • D. Valence electrons decrease
Answer: A
Explanation: Loss of electrons becomes more difficult.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

12. Metallic character generally increases down a group because:

  • A. Ionisation potential decreases
  • B. Atomic size decreases
  • C. Electronegativity rises
  • D. Shielding decreases
Answer: A
Explanation: Outer electrons are lost more easily.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

13. Which order shows increasing metallic character in Period 3?

  • A. Na<Mg<Al<Si<P<S<Cl
  • B. Cl<S<P<Si<Al<Mg<Na
  • C. Cl<Na<Mg<Al
  • D. Si<Al<Cl<Na
Answer: B
Explanation: Metallic character decreases left to right.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

14. Non-metallic character generally increases across a period because:

  • A. Electron-gaining tendency increases
  • B. Atomic size increases
  • C. Ionisation potential decreases
  • D. Shielding dominates
Answer: A
Explanation: Atoms increasingly tend to gain electrons.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

15. The configuration ns²np⁵ corresponds to:

  • A. Group 1
  • B. Group 2
  • C. Group 17
  • D. Group 18
Answer: C
Explanation: Seven valence electrons indicate halogens.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

16. Which oxide is amphoteric?

  • A. Na₂O
  • B. SO₃
  • C. Al₂O₃
  • D. Cl₂O₇
Answer: C
Explanation: Al₂O₃ reacts with both acids and bases.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

17. Across Period 3, acidic character of oxides generally:

  • A. Decreases
  • B. Increases
  • C. Remains constant
  • D. Becomes zero
Answer: B
Explanation: Non-metallic character increases across the period.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

18. Which oxide is strongly basic?

  • A. Na₂O
  • B. SO₂
  • C. P₄O₁₀
  • D. Cl₂O₇
Answer: A
Explanation: Na₂O is strongly basic.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

19. Isotopes occupy the same periodic-table position because they have the same:

  • A. Atomic mass
  • B. Atomic number
  • C. Neutron number
  • D. Mass number
Answer: B
Explanation: Position is determined by atomic number.

ICSE Class 10 Chemistry · Periodic Properties and Variations of Properties · Very Very Hard

20. Among O²⁻, F⁻, Na⁺ and Mg²⁺, the smallest is:

  • A. O²⁻
  • B. F⁻
  • C. Na⁺
  • D. Mg²⁺
Answer: D
Explanation: Mg²⁺ has the greatest nuclear charge in the isoelectronic series.

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Periodic Properties and Variations of Properties Practice Tests

Periodic Properties and Variations of Properties Frequently Asked Questions

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