Relevant Titles
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CBSE Class 11 Chemistry MCQs on s-Block Elements (Alkali & Alkaline Earth Metals)
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NCERT-Based Class 11 Chemistry Quiz – s-Block Elements Practice Questions
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CBSE Inorganic Chemistry Chapter 10 – s-Block Elements Online Test
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Class 11 Chemistry MCQs – Alkali and Alkaline Earth Metals Practice Quiz
Introduction Paragraph
s-Block Elements (Alkali and Alkaline Earth Metals) form the foundation of Inorganic Chemistry in Chapter 10 of the CBSE Class 11 Chemistry syllabus. This topic introduces students to the properties, trends, and reactions of Group 1 and Group 2 elements, including lithium, sodium, potassium, magnesium, and calcium. Understanding their chemical behavior is essential, as these metals are widely used in industries, biological systems, and environmental chemistry.
This CBSE Class 11 Chemistry Online Practice Test provides a set of MCQs based strictly on the NCERT textbook, making it ideal for both CBSE board exam and competitive exam preparation. Each question is designed to strengthen your conceptual understanding through automatic scoring and instant feedback.
From the reactivity of alkali metals with water to the flame test colors of alkaline earth metals, these MCQs help you master the periodic properties and real-life applications of s-block elements effectively and interactively.
Sample MCQs (with Answers and Explanations):
Q1. Which of the following is an alkali metal?
A) Calcium B) Magnesium C) Sodium D) Aluminium
Answer: C
Explanation: Sodium (Na) belongs to Group 1 of the periodic table and is classified as an alkali metal.
Q2. Which alkaline earth metal gives a brick-red color in a flame test?
A) Magnesium B) Calcium C) Barium D) Strontium
Answer: B
Explanation: Calcium imparts a characteristic brick-red color in a flame test, which helps in its identification.
Q3. Which oxide of an s-block element is amphoteric in nature?
A) Na₂O B) MgO C) BeO D) CaO
Answer: C
Explanation: Beryllium oxide (BeO) shows both acidic and basic behavior, hence it is amphoteric in nature.
Q4. Which metal forms an insoluble carbonate that decomposes on heating?
A) Na₂CO₃ B) K₂CO₃ C) CaCO₃ D) NH₄HCO₃
Answer: C
Explanation: Calcium carbonate (CaCO₃) decomposes on heating to form calcium oxide and carbon dioxide gas.
Q5. Which alkali metal is used to manufacture common salt and caustic soda?
A) Lithium B) Sodium C) Potassium D) Rubidium
Answer: B
Explanation: Sodium is used to make sodium chloride (common salt) and sodium hydroxide (caustic soda) industrially.