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CBSE Class 11 Chemistry MCQs on Periodicity in Properties – Free Online Quiz
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📚 Introduction
CBSE Class 11 Chemistry MCQs – Periodicity in Properties are designed according to the NCERT Class 11 Chemistry syllabus to help students strengthen their understanding of periodic trends and the classification of elements. This topic—Chapter 3: Classification of Elements and Periodicity in Properties—forms the foundation of modern chemistry, explaining how atomic structure influences properties like ionization energy, electronegativity, atomic radius, metallic character, and electron affinity.
These CBSE Class 11 Chemistry MCQs offer an engaging way to review concepts and prepare effectively for school tests, pre-board exams, and competitive exams such as JEE Main and NEET. Each question comes with detailed feedback and explanations, ensuring students not only recall facts but also understand underlying principles.
Start practicing now and master the trends that govern the behavior of elements in the periodic table — the key to excelling in both board and entrance examinations.
🧩 Sample MCQs (with Answers and Explanations):
Q1. Atomic radius generally ___ across a period from left to right.
a) Increases b) Decreases c) Remains same d) Varies irregularly
✅ Answer: b) Decreases
Explanation: Across a period, effective nuclear charge increases, pulling electrons closer to the nucleus and reducing atomic size.
Q2. Ionization energy refers to the energy required to:
a) Add an electron b) Remove an electron c) Break a bond d) Split a nucleus
✅ Answer: b) Remove an electron
Explanation: Ionization energy is the energy needed to remove the most loosely bound electron from a gaseous atom.
Q3. Which element has the highest electronegativity?
a) Oxygen b) Fluorine c) Chlorine d) Nitrogen
✅ Answer: b) Fluorine
Explanation: Fluorine is the most electronegative element due to its small size and strong nuclear attraction for bonding electrons.
Q4. Metallic character ___ down a group and ___ across a period.
a) Decreases, increases b) Increases, decreases c) Constant, increases d) Increases, constant
✅ Answer: b) Increases, decreases
Explanation: Down a group, atoms lose electrons more easily (more metallic), while across a period, non-metallic character increases.
Q5. The element with configuration [Ne] 3s² 3p⁵ belongs to which group?
a) Group 16 b) Group 17 c) Group 18 d) Group 15
✅ Answer: b) Group 17
Explanation: The ns² np⁵ configuration corresponds to halogens (Group 17) with seven valence electrons, highly reactive non-metals.
✅ Highlight: These MCQs are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 11 board exam preparation and concept-based learning.