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📚 Introduction
CBSE Class 11 Chemistry MCQs – Concept MCQs on s, p, d, f Block Overview are designed strictly as per the NCERT syllabus, focusing on the Classification of Elements and Periodicity in Properties. This online practice test helps students strengthen their conceptual understanding of the periodic table’s structure — from s-block (alkali and alkaline earth metals) to p-block (non-metals, metalloids, and halogens), d-block (transition elements), and f-block (inner transition series).
These multiple-choice questions (MCQs) are curated to match CBSE Class 11 board exam standards, making them ideal for students preparing for school tests, pre-boards, and competitive exams like JEE Main and NEET. Each question is followed by a detailed explanation to enhance concept retention and problem-solving ability.
Start your chemistry practice now and master periodic trends, block classification, and the electronic configurations that define modern chemistry fundamentals.
🧩 Sample MCQs (with Answers and Explanations):
Q1. The elements with their valence electrons in the s-orbital belong to which block?
a) p-block b) d-block c) s-block d) f-block
✅ Answer: c) s-block
Explanation: s-block elements (Group 1 and 2) have their outermost electrons in the s-orbital, making them highly reactive metals.
Q2. Which block contains both metals, metalloids, and non-metals?
a) s-block b) p-block c) d-block d) f-block
✅ Answer: b) p-block
Explanation: The p-block includes a wide variety of elements — metals, metalloids, and non-metals — found in Groups 13–18.
Q3. Transition elements are part of which block in the periodic table?
a) s-block b) p-block c) d-block d) f-block
✅ Answer: c) d-block
Explanation: d-block elements have partially filled d-orbitals and exhibit properties like variable oxidation states and colored compounds.
Q4. Lanthanoids and actinoids are collectively known as:
a) s-block elements b) inner transition elements c) metalloids d) p-block elements
✅ Answer: b) inner transition elements
Explanation: Lanthanoids and actinoids belong to the f-block and are referred to as inner transition elements due to their 4f and 5f orbital filling.
Q5. Which of the following blocks shows maximum variability in oxidation states?
a) s-block b) p-block c) d-block d) f-block
✅ Answer: c) d-block
Explanation: d-block transition metals exhibit multiple oxidation states due to the involvement of (n–1)d and ns electrons in bonding.