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Introduction
Ace your CBSE Class 11 Chemistry preparation with this NCERT-based Online Practice Test on s-Block Elements and Compounds. This chapter from Inorganic Chemistry – Part B (Chapter 10) explores the properties, reactions, and applications of alkali metals (Group 1) and alkaline earth metals (Group 2), forming the foundation for board and entrance-level exams.
These Class 11 Chemistry MCQs are designed strictly as per the latest NCERT syllabus, focusing on important topics such as chemical reactivity, solubility trends, flame tests, diagonal relationships, and compound formation. Each question includes a detailed explanation to help students grasp the underlying concepts more effectively.
Whether preparing for CBSE board exams, JEE, or NEET, this NCERT quiz on s-Block Elements provides a perfect way to test your understanding and improve problem-solving skills. Attempt this 30-minute timed test and get instant scoring with feedback—an ideal tool for revision and self-evaluation before exams.
Sample MCQs (with Answers and Explanations):
Q1. Which of the following compounds is known as washing soda?
A) NaHCO₃
B) Na₂CO₃·10H₂O
C) Na₂SO₄
D) K₂CO₃
Answer: B) Na₂CO₃·10H₂O
Explanation: Washing soda is sodium carbonate decahydrate, used for cleaning, glass making, and water softening.
Q2. Which metal shows an anomalous behavior in Group 1 elements?
A) Sodium
B) Lithium
C) Potassium
D) Cesium
Answer: B) Lithium
Explanation: Lithium differs due to its small size and high polarizing power, forming covalent compounds unlike other alkali metals.
Q3. Which calcium compound is used in cement manufacturing?
A) Ca(OH)₂
B) CaCO₃
C) CaO
D) CaSO₄·2H₂O
Answer: C) CaO
Explanation: Calcium oxide (quicklime) is a key component in cement, reacting with silica and alumina during production.
Q4. Which magnesium compound is commonly known as milk of magnesia?
A) MgCO₃
B) Mg(OH)₂
C) MgSO₄·7H₂O
D) MgCl₂
Answer: B) Mg(OH)₂
Explanation: Milk of magnesia is magnesium hydroxide, used as an antacid and mild laxative due to its weak basic nature.
Q5. Which alkali metal compound is used in gunpowder and fertilizers?
A) KCl
B) K₂CO₃
C) KNO₃
D) Na₂SO₄
Answer: C) KNO₃
Explanation: Potassium nitrate (KNO₃) is a strong oxidizing agent used in fertilizers and explosive mixtures like gunpowder.