The s-block elements are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons, this block contains only two groups: group 1 (or IA) and group 2 (or Il A). They have one or two electrons in their outermost s-subshell, respectively. These are placed on the left-hand side of the Long Form of the periodic table.
The elements of group 1 are called alkali metals, and those of group 2 are called alkaline earth metals. Therefore, alkali metals and alkaline earth metals constitute s-block.
Download Class 11 Chemistry Worksheet on Chapter 10 The s-Block Elements Set 1 PDF
CBSE Class 11 Chemistry Chapter 10 The s-Block Elements Worksheet – Set 1
Q1. Which of the following is most basic?
(a) CsOH
(b) RbOH
(c) KOH
(d) LiOH
Q2. Lithium shows a diagonal relationship with _______.
(a) Beryllium
(b) Magnesium
(c) Calcium
(d) None of the above
Q3. Which of the following elements is extracted by Dow’s process?
(a) Sodium
(b) Magnesium
(c) Both (a) and (b)
(d) None of the above
Q4. What is the chemical formula of carnallite?
(a) KCl MgCl2. 6H2O
(b) Ca2B6O11. 2H2O
(c) Ca2Mg2 Si6O22 (OH)2
(d) None of the above
Q5. Which of the following compounds is extracted by using Solvay’s process?
(a) Sodium carbonate
(b) Sodium hydroxide
(c) Sodium chloride
(d) None of the above
Q6. Name the element which is invariably bivalent and whose oxide is soluble in excess of sodium hydroxide, and its positive ion has a noble gas configuration.
Q7. Why is magnesium ion much more heavily hydrated than sodium ion?
Q8. Why are halides of beryllium polymeric?
Q9. What is the chemical formula of quicklime, slaked lime and lime water?
Q10. What is dead burnt plaster? How is it synthesised?
Q11. Why does the first element in each group show anomalous properties?
Q12. Why is lithium chloride soluble in organic solvents?
Q13. Why do we keep sodium metal under kerosene?
Q14. Answer the following questions.
(a) Why does beryllium chloride give an acidic solution when dissolved in water?
(b) Why are salts of alkaline earth metals colourless and diamagnetic?
Q15. Answer the following questions.
(a) Why is lithium iodide less stable than caesium iodide?
(b) Differentiate the structure of calcium hydride and beryllium hydride.
Q16. What happens when sodium dioxide reacts with water? Write the balanced chemical equation for the reaction.
Q17. What happens when potassium dioxide reacts with water? Write the balanced chemical equation for the reaction.
Q18. What is the oxidation state of
(a) Lithium in Li2O
(b) Sodium in Na2O2
(c) Potassium in KO2
Q19. What is a diagonal relationship? What is its cause?
Q20. Discuss evidence to show the diagonal relationship between lithium and magnesium.
Download the PDF to access answers to the Chemistry Worksheet for Class 11 Chemistry Chapter 10 The s-Block Elements Set -1
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Read Also:
- Peculiar Properties of Beryllium and Lithium
- Class 11 Chemistry Chapter 10 The s-Block Elements MCQs
- Important Questions for Class 11 Chemistry Chapter 10 – The s-Block Elements.
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