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Periodic Trends and Table Arrangement Class 11 Chemistry MCQs with Answers
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CBSE Class 11 Physical Chemistry Quiz – Periodicity and Table Arrangement
Introduction Paragraph
The CBSE Class 11 Chemistry MCQs on “Periodic Trends and Table Arrangement” are designed to help students strengthen their conceptual understanding of how elements are organized in the modern periodic table. This topic, from Chapter 3: Classification of Elements and Periodicity in Properties, is a cornerstone of physical chemistry and explains how atomic structure influences chemical behavior and periodic properties.
In this online practice test, students can explore key trends such as atomic radius, ionization enthalpy, electron affinity, electronegativity, and valency, while understanding how these vary across periods and groups. Each question is crafted as per the NCERT Class 11 syllabus and includes instant feedback with detailed explanations to reinforce conceptual clarity.
These MCQs are ideal for CBSE Class 11 board exam preparation and form the basis for competitive exams like JEE and NEET. Practicing them regularly helps students improve analytical thinking, recall accuracy, and speed under timed conditions.
Sample MCQs (with Answers and Explanations)
Q1. The modern periodic law states that the properties of elements are the periodic function of their:
A) Atomic mass B) Atomic number C) Valency D) Electron affinity
Answer: B) Atomic number
Explanation: Henry Moseley formulated the modern periodic law based on atomic number, not atomic mass, ensuring better periodic classification.
Q2. Which element in period 3 has the smallest atomic radius?
A) Na B) Mg C) Si D) Ar
Answer: D) Ar
Explanation: As we move across a period, effective nuclear charge increases, reducing atomic size. Argon, at the end of the period, is smallest.
Q3. Down a group, atomic size generally:
A) Increases B) Decreases C) Remains constant D) Becomes unpredictable
Answer: A) Increases
Explanation: New electron shells are added as we go down a group, increasing the distance between nucleus and outer electrons.
Q4. Which element has the highest electronegativity?
A) Oxygen B) Fluorine C) Chlorine D) Nitrogen
Answer: B) Fluorine
Explanation: Fluorine is the most electronegative element (3.98 on Pauling scale) due to its small atomic size and high nuclear charge.
Q5. Which group contains the halogens?
A) Group 1 B) Group 2 C) Group 17 D) Group 18
Answer: C) Group 17
Explanation: Halogens are nonmetals in Group 17 that exhibit high reactivity due to their strong tendency to gain one electron.