Class 11 Chemistry The s Block Element Exam Questions

Read and download the Class 11 Chemistry The s Block Element Exam Questions. Designed for 2025-26, this advanced study material provides Class 11 Chemistry students with detailed revision notes, sure-shot questions, and detailed answers. Prepared by expert teachers and they follow the latest CBSE, NCERT, and KVS guidelines to ensure you get best scores.

Advanced Study Material for Class 11 Chemistry Chapter 10 The s Block Elements

To achieve a high score in Chemistry, students must go beyond standard textbooks. This Class 11 Chapter 10 The s Block Elements study material includes conceptual summaries and solved practice questions to improve you understanding.

Class 11 Chemistry Chapter 10 The s Block Elements Notes and Questions

 

LEVEL – 1
 
1. Name the alkali metal which form superoxide when heated in excess of air.
Ans: Potassium
 
2. LiCl is more soluble in organic solvent, why?
Ans: It is due to covalent in nature.
 
3. Explain why Sodium is less reactive than Potassium?
Ans: Due to less metallic character of sodium
 
4. Why are Potassium, and Cesium , rather lithium can be used in photoelectric cell ?
Ans: Due to lesser ionisation enthalphy.
 
5. Lithium is the only alkali metal to form nitride.
Ans: Due to diagonal relationship with Mg.
 
6. Name the radioactive element of group 1 and 2.
Ans: Fr and Ra
 
7. Explain why alkali and alkaline earth metals cannot be obtained by chemical reduction?
Ans: They are better reducing agent than C and CO.
 
LEVEL – 2
 
1. Explain the following :
(i) The mobility of the alkali metal ion in aqueous solution are :
(ii) Lithium is the only alkali metal to form nitride directly.
Ans: (i) The magnitude of hydration enthalphy decreases down the group so the size of the hydrated ion decreases down the group. (ii) Due to diagonal relationship with Mg.
 
2. ‘The chemistry of beryllium is not essentially ionic’. Justify the statement by making a reference of beryllium.
Ans: It is due to high polarising power of Be cation its compound are covalent in nature.
 
3. When alkali metal dissolves in liquid ammonia, the solution gives deep blue colour which is conducting in nature .Why?
Ans: Due to ammoniated cation and ammoniated electron.
 
4. Describe the three industrial uses of caustic soda.
Ans: Industrial uses of caustic soda:
(i) In soap industries
(ii) In the laboratory
(iii) In cotton industries.
 
5. Why it is necessary to add gypsum in the final stages of preparation of cement?
Ans: To increase the time of setting of the cement.
 
6. Beryllium and Magnesium do not give colour to flame whereas other alkaline earth metals do so why?
Ans: Due to high ionisation enthalpy of Be and Mg.
 
7. What happens when
(i) Sodium metal is dropped in water?
(ii) Sodium metal is heated in free supply of air?
(iii) Sodium peroxide is dissolved in water?
Ans: (i) NaOH is formed. (ii) Na2O2 is formed (iii) NaOH and H2O2is formed.
 
8. What happen when
(i) Calcium nitrate is heated?
(ii) Chlorine reacts with slaked lime?
(iii) Magnesium is burnt in air?
Ans: (i) CaO and O2 and NO2 (ii) bleaching powder is formed. (iii) MgO is formed.
 
EVEL – 3
 
1. Write balanced equation for the reaction between :
(i) KO2 and water
(ii) BeO + H2SO4
(iii) Ca(OH)2 + Cl2
 
Class 11 Chemistry Redox Reactions Exam Questions-14
 
 
2. Give a brief account of the following :
(i) Blue colour solutions of alkali metals in liquid ammonia.
(ii) Tendency to form divalent compounds of alkaline earth metals than monovalent.
(iii) Tendency to give flame colours by alkali metals.
Ans:
(i) Due to the presence of ammoniated electron.
(ii) In divalent oxidation state the octet is complete.
(iii) Due to less ionisation enthalpy of alkali metals.
 
 
Chapter 04 Chemical Bonding and Molecular Structure
Class 11 Chemistry Chemical Bonding and Molecular Structure Exam Questions

CBSE Class 11 Chemistry Chapter 10 The s Block Elements Study Material

Students can find all the important study material for Chapter 10 The s Block Elements on this page. This collection includes detailed notes, Mind Maps for quick revision, and Sure Shot Questions that will come in your CBSE exams. This material has been strictly prepared on the latest 2026 syllabus for Class 11 Chemistry. Our expert teachers always suggest you to use these tools daily to make your learning easier and faster.

Chapter 10 The s Block Elements Expert Notes & Solved Exam Questions

Our teachers have used the latest official NCERT book for Class 11 Chemistry to prepare these study material. We have included previous year examination questions and also step-by-step solutions to help you understand the marking scheme too. After reading the above chapter notes and solved questions also solve the practice problems and then compare your work with our NCERT solutions for Class 11 Chemistry.

Complete Revision for Chemistry

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